Opcode = byte / 37 % 7
operand = byte % 37

Opcodes:
0 = #ifdef %c
1 = #undef %c
2 = #ifndef %c
3 = #define %c

	Operands:
	0 = _
	1 .. 17 = step
	18 .. 34 = seed
	35 = OUTPUT_BYTE
	36 = RUN_PRNG

4

	Operands:
	4 = #endif
	5 = #else
	6 = static const unsigned char data[] = {
	7 = };
	8 = 0,
	9 = -~
	10 = #define _ __FILE__
	11 = #ifndef PIN\n#error

5

	Operands:
	0 .. 15 = #if PIN %% %d > %d
	16 = int main() { return !fwrite(data, %d, %d, stdout); }

6 = #include %s

	Operands:
	0 = _
	1 = <stdio.h>