C11111333133313232233133313331333133313221333133313232212111111331323211211   >>    C1111133313331323223313331333133313331322133313331323221211111133132321121   <<    C11111333133313232233133313331333133313221333133313232212111111331323211213   >>      C11111333133313232233133313331333133313221333133313232212111111331323211212   >>