C12121223131323223313233231323132312323132322331313231323132211   >>    C1212122313132322331323323132313231232313232233131323132313221   <<    C12121223131323223313233231323132312323132322331313231323132213   >>      C12121223131323223313233231323132312323132322331313231323132212   >>