C111113331333132322331333133313331333132313121111332313233313232212111   >>    C11111333133313232233133313331333133313231312111133231323331323221211   <<    C111113331333132322331333133313331333132313121111332313233313232212113   >>      C111113331333132322331333133313331333132313121111332313233313232212112   >>