C1111233131211111211113313331333133313311211111333133313331333132313233231211   >>    C111123313121111121111331333133313331331121111133313331333133313231323323121   <<    C1111233131211111211113313331333133313311211111333133313331333132313233231213   >>      C1111233131211111211113313331333133313311211111333133313331333132313233231212   >>