C1212121231123232233131323223313233313231323121133132313231333132223221   >>    C121212123112323223313132322331323331323132312113313231323133313222322   <<    C1212121231123232233131323223313233313231323121133132313231333132223223   >>      C1212121231123232233131323223313233313231323121133132313231333132223222   >>