C1111233131211111211113313331333133313232212111133132311232133121   >>    C111123313121111121111331333133313331323221211113313231123213312   <<    C1111233131211111211113313331333133313232212111133132311232133123   >>      C1111233131211111211113313331333133313232212111133132311232133122   >>