C11111333133313232233133313331333133313231312111111221123132311   >>    C1111133313331323223313331333133313331323131211111122112313231   <<    C11111333133313232233133313331333133313231312111111221123132313   >>      C11111333133313232233133313331333133313231312111111221123132312   >>