C1212121231123232233131323223313233313233313223313232332313231323121   >>    C121212123112323223313132322331323331323331322331323233231323132312   <<    C1212121231123232233131323223313233313233313223313232332313231323123   >>      C1212121231123232233131323223313233313233313223313232332313231323122   >>