C12121212311232322331313232233132313331323331323223313233232211   >>    C1212121231123232233131323223313231333132333132322331323323221   <<    C12121212311232322331313232233132313331323331323223313233232213   >>      C12121212311232322331313232233132313331323331323223313233232212   >>