C1212121231123232233131323223313231333132322133313233313231311121   >>    C121212123112323223313132322331323133313232213331323331323131112   <<    C1212121231123232233131323223313231333132322133313233313231311123   >>      C1212121231123232233131323223313231333132322133313233313231311122   >>