C1111233131211111211113313231333133313331323221211113313311211111132233131   >>    C111123313121111121111331323133313331333132322121111331331121111113223313   <<    C1111233131211111211113313231333133313331323221211113313311211111132233133   >>      C1111233131211111211113313231333133313331323221211113313311211111132233132   >>