C1111233131211111211113313331323133313231333133313221333131112121   >>    C111123313121111121111331333132313331323133313331322133313111212   <<    C1111233131211111211113313331323133313231333133313221333131112123   >>      C1111233131211111211113313331323133313231333133313221333131112122   >>