BYOYTMYBKK
BBYOBBPOM
OTOBYOTTYOM
TBTBTTBTO
MYYBYYYO
append 0 BKBY
trim 1 6
clip 2 3 6
slice 3 3 6 
print
copy 4 3
swap 0 6 1 4
transcribe 2
print
trim 6 12
append 3 POKABC
slice 4 5 15