C21111113313132322331323331323113313233313231122112323133313232121111   >>    C2111111331313232233132333132311331323331323112211232313331323212111   <<    C21111113313132322331323331323113313233313231122112323133313232121113   >>      C21111113313132322331323331323113313233313231122112323133313232121112   >>