C1111233131211111211113313231333133313331323221211113313221123313231121   >>    C111123313121111121111331323133313331333132322121111331322112331323112   <<    C1111233131211111211113313231333133313331323221211113313221123313231123   >>      C1111233131211111211113313231333133313331323221211113313221123313231122   >>