C1212121231123232233131323223313233313231323121133132313231322221   >>    C121212123112323223313132322331323331323132312113313231323132222   <<    C1212121231123232233131323223313233313231323121133132313231322223   >>      C1212121231123232233131323223313233313231323121133132313231322222   >>