C1111233131211111211113313231333133313331323221211113313311211113312233111   >>    C111123313121111121111331323133313331333132322121111331331121111331223311   <<    C1111233131211111211113313231333133313331323221211113313311211113312233113   >>      C1111233131211111211113313231333133313331323221211113313311211113312233112   >>