C1212121231123232233131323223313231323331323121133132313231333121   >>    C121212123112323223313132322331323132333132312113313231323133312   <<    C1212121231123232233131323223313231323331323121133132313231333123   >>      C1212121231123232233131323223313231323331323121133132313231333122   >>