C1111133313331323223313331333133313331333131211113313331323133313233313211   >>    C111113331333132322331333133313331333133313121111331333132313331323331321   <<    C1111133313331323223313331333133313331333131211113313331323133313233313213   >>      C1111133313331323223313331333133313331333131211113313331323133313233313212   >>