C11111333133313232233133313331333133313231313131211113313233323321   >>    C1111133313331323223313331333133313331323131313121111331323332332   <<    C11111333133313232233133313331333133313231313131211113313233323323   >>      C11111333133313232233133313331333133313231313131211113313233323322   >>