C1111233131211111211113313133313331323133313231323223313223313121   >>    C111123313121111121111331313331333132313331323132322331322331312   <<    C1111233131211111211113313133313331323133313231323223313223313123   >>      C1111233131211111211113313133313331323133313231323223313223313122   >>