v by %20

\x7fELF
echo v

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

Disassemble:


00000000 <.data>:
   0:	7f 45                	jg     0x47
   2:	4c                   	dec    %esp
   3:	46                   	inc    %esi
   4:	0a 65 63             	or     0x63(%ebp),%ah
   7:	68                   	.byte 0x68
   8:	6f                   	outsl  %ds:(%esi),(%dx)
   9:	20                   	.byte 0x20
   a:	76                   	.byte 0x76

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