diff --git a/C/strange_size/i65.c b/C/strange_size/i65.c
new file mode 100644
index 0000000..2b2743a
--- /dev/null
+++ b/C/strange_size/i65.c
@@ -0,0 +1,10 @@
+#include <stdio.h>
+#include <stdint.h>
+
+int main(int argc, char **argv) {
+	uint64_t i = (uint64_t)(-1LL);
+	uint64_t j = (uint64_t)(-1LL);
+	uint64_t k = i + j;
+	printf("%lu + %lu = %lu\n", i, j, k);
+	return 0;
+}
diff --git a/C/strange_size/i65.s b/C/strange_size/i65.s
new file mode 100644
index 0000000..93b1eae
--- /dev/null
+++ b/C/strange_size/i65.s
@@ -0,0 +1,46 @@
+; ModuleID = 'i65.c'
+source_filename = "i65.c"
+target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-pc-linux-gnu"
+
+@.str = private unnamed_addr constant [17 x i8] c"%lu + %lu = %lu\0A\00", align 1
+
+; Function Attrs: noinline nounwind optnone sspstrong uwtable
+define dso_local i32 @main(i32, i8**) #0 {
+  %3 = alloca i32, align 4
+  %4 = alloca i32, align 4
+  %5 = alloca i8**, align 8
+  %6 = alloca i65, align 8
+  %7 = alloca i65, align 8
+  %8 = alloca i65, align 8
+  store i32 0, i32* %3, align 4
+  store i32 %0, i32* %4, align 4
+  store i8** %1, i8*** %5, align 8
+  store i65 -1, i65* %6, align 8
+  store i65 -1, i65* %7, align 8
+  %9 = load i65, i65* %6, align 8
+  %10 = load i65, i65* %7, align 8
+  %11 = add i65 %9, %10
+  store i65 %11, i65* %8, align 8
+  %12 = load i65, i65* %6, align 8
+  %13 = load i65, i65* %7, align 8
+  %14 = load i65, i65* %8, align 8
+  %15 = trunc i65 %12 to i64
+  %16 = trunc i65 %13 to i64
+  %17 = trunc i65 %14 to i64
+  %18 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i32 0, i32 0), i64 %15, i64 %16, i64 %17)
+  ret i32 0
+}
+
+declare i32 @printf(i8*, ...) #1
+
+attributes #0 = { noinline nounwind optnone sspstrong uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
+
+!llvm.module.flags = !{!0, !1, !2}
+!llvm.ident = !{!3}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 7, !"PIC Level", i32 2}
+!2 = !{i32 7, !"PIE Level", i32 2}
+!3 = !{!"clang version 7.0.0 (tags/RELEASE_700/final)"}
diff --git a/C/strange_size/i65.s.s b/C/strange_size/i65.s.s
new file mode 100644
index 0000000..0b670e6
--- /dev/null
+++ b/C/strange_size/i65.s.s
@@ -0,0 +1,59 @@
+	.text
+	.intel_syntax noprefix
+	.file	"i65.c"
+	.globl	main                    # -- Begin function main
+	.p2align	4, 0x90
+	.type	main,@function
+main:                                   # @main
+	.cfi_startproc
+# %bb.0:
+	push	rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset rbp, -16
+	mov	rbp, rsp
+	.cfi_def_cfa_register rbp
+	sub	rsp, 80
+	mov	dword ptr [rbp - 56], 0
+	mov	dword ptr [rbp - 52], edi
+	mov	qword ptr [rbp - 64], rsi
+	mov	byte ptr [rbp - 24], 1
+	mov	qword ptr [rbp - 32], -1
+	mov	byte ptr [rbp - 8], 1
+	mov	qword ptr [rbp - 16], -1
+	movzx	eax, byte ptr [rbp - 24]
+	mov	rcx, qword ptr [rbp - 32]
+	movzx	edx, byte ptr [rbp - 8]
+	mov	rsi, qword ptr [rbp - 16]
+	add	rcx, rsi
+	adc	rax, rdx
+	mov	qword ptr [rbp - 48], rcx
+	and	eax, 1
+	mov	byte ptr [rbp - 40], al
+	movzx	edx, byte ptr [rbp - 24]
+	mov	rsi, qword ptr [rbp - 32]
+	movzx	r8d, byte ptr [rbp - 8]
+	mov	rcx, qword ptr [rbp - 16]
+	movzx	eax, byte ptr [rbp - 40]
+	mov	r9, qword ptr [rbp - 48]
+	mov	qword ptr [rsp], rax
+	mov	edi, offset .L.str
+	xor	eax, eax
+	call	printf
+	xor	eax, eax
+	add	rsp, 80
+	pop	rbp
+	.cfi_def_cfa rsp, 8
+	ret
+.Lfunc_end0:
+	.size	main, .Lfunc_end0-main
+	.cfi_endproc
+                                        # -- End function
+	.type	.L.str,@object          # @.str
+	.section	.rodata.str1.1,"aMS",@progbits,1
+.L.str:
+	.asciz	"%lu + %lu = %lu\n"
+	.size	.L.str, 17
+
+
+	.ident	"clang version 7.0.0 (tags/RELEASE_700/final)"
+	.section	".note.GNU-stack","",@progbits
diff --git a/C/strange_size/strange_size.c b/C/strange_size/i7.c
similarity index 100%
rename from C/strange_size/strange_size.c
rename to C/strange_size/i7.c
diff --git a/C/strange_size/strange_size.s b/C/strange_size/i7.s
similarity index 100%
rename from C/strange_size/strange_size.s
rename to C/strange_size/i7.s
diff --git a/C/strange_size/strange_size.s.s b/C/strange_size/i7.s.s
similarity index 100%
rename from C/strange_size/strange_size.s.s
rename to C/strange_size/i7.s.s