C1111133313331323223313331333133313331323131211113313113313223313231333112121   >>    C111113331333132322331333133313331333132313121111331311331322331323133311212   <<    C1111133313331323223313331333133313331323131211113313113313223313231333112123   >>      C1111133313331323223313331333133313331323131211113313113313223313231333112122   >>