C11111333133313232233133313331333133313233333211312111133132313221   >>    C1111133313331323223313331333133313331323333321131211113313231322   <<    C11111333133313232233133313331333133313233333211312111133132313223   >>      C11111333133313232233133313331333133313233333211312111133132313222   >>