# Nasm, 3 characters.
any of the following:
```asm
ret
nop
cbw
cwd
cdq
clc
cld
cli
cmc
aaa
aas
aad
aam
stc
std
sti

```
`ret` raises SIGSEGV via _stack underflow_. All the other opcodes raise SIGSEGV simply because there's no exit point.