C11111333133313232233133313331333133313231312111113331311112121   >>    C1111133313331323223313331333133313331323131211111333131111212   <<    C11111333133313232233133313331333133313231312111113331311112123   >>      C11111333133313232233133313331333133313231312111113331311112122   >>