C22212323232133313113313331333132313331323132321111313213212211   >>    C2221232323213331311331333133313231333132313232111131321321221   <<    C22212323232133313113313331333132313331323132321111313213212213   >>      C22212323232133313113313331333132313331323132321111313213212212   >>