C111123313331323113313331323133313331311331311331323133313233311231332211   >>    C11112331333132311331333132313331333131133131133132313331323331123133221   <<    C111123313331323113313331323133313331311331311331323133313233311231332213   >>      C111123313331323113313331323133313331311331311331323133313233311231332212   >>