C111123313331323113313331333133313331323131211113313121111331333112211232322131   >>    C11112331333132311331333133313331333132313121111331312111133133311221123232213   <<    C111123313331323113313331333133313331323131211113313121111331333112211232322133   >>      C111123313331323113313331333133313331323131211113313121111331333112211232322132   >>