cpy a b
dec b
cpy a d
cpy 0 a
cpy b c
inc a
dec c
jnz c -2
dec d
jnz d -5
cpy c d
inc c
jnz d -2
tgl c
cpy -16 c
jnz 1 c
cpy 72 c
jnz 77 d
inc d
jnz c -5