C11111333133313232233133313331333133313233231331121111331311222123311   >>    C1111133313331323223313331333133313331323323133112111133131122212331   <<    C11111333133313232233133313331333133313233231331121111331311222123313   >>      C11111333133313232233133313331333133313233231331121111331311222123312   >>