C1212121231123232233131323223313231333132322113313231333131232322121   >>    C121212123112323223313132322331323133313232211331323133313123232212   <<    C1212121231123232233131323223313231333132322113313231333131232322123   >>      C1212121231123232233131323223313231333132322113313231333131232322122   >>