C1212121231123232233131323223313231333132322113313231333132313231323121   >>    C121212123112323223313132322331323133313232211331323133313231323132312   <<    C1212121231123232233131323223313231333132322113313231333132313231323123   >>      C1212121231123232233131323223313231333132322113313231333132313231323122   >>