C1111233131211111211113313231333133313331323221211113313311211111121323231   >>    C111123313121111121111331323133313331333132322121111331331121111112132323   <<    C1111233131211111211113313231333133313331323221211113313311211111121323233   >>      C1111233131211111211113313231333133313331323221211113313311211111121323232   >>