C111123313331323113313331333133313121111133112121111331311221123232233133322131   >>    C11112331333132311331333133313331312111113311212111133131122112323223313332213   <<    C111123313331323113313331333133313121111133112121111331311221123232233133322133   >>      C111123313331323113313331333133313121111133112121111331311221123232233133322132   >>