C12121223131323223313233231323132322331313331323132313231323211   >>    C1212122313132322331323323132313232233131333132313231323132321   <<    C12121223131323223313233231323132322331313331323132313231323213   >>      C12121223131323223313233231323132322331313331323132313231323212   >>