C1212121231123232233131323223313233313233313223313231311331323131121   >>    C121212123112323223313132322331323331323331322331323131133132313112   <<    C1212121231123232233131323223313233313233313223313231311331323131123   >>      C1212121231123232233131323223313233313233313223313231311331323131122   >>