C11111333133313232233133313331333133313231312111113331313323321   >>    C1111133313331323223313331333133313331323131211111333131332332   <<    C11111333133313232233133313331333133313231312111113331313323323   >>      C11111333133313232233133313331333133313231312111113331313323322   >>