C2122121212121133131323331313113313233313231322331311331323223221   >>    C212212121212113313132333131311331323331323132233131133132322322   <<    C2122121212121133131323331313113313233313231322331311331323223223   >>      C2122121212121133131323331313113313233313231322331311331323223222   >>