C11111333133313232233133313331333131133132313311211113313112131   >>    C1111133313331323223313331333133313113313231331121111331311213   <<    C11111333133313232233133313331333131133132313311211113313112133   >>      C11111333133313232233133313331333131133132313311211113313112132   >>