C1111233131211111211113313331333133313232212111133132233232223213321   >>    C111123313121111121111331333133313331323221211113313223323222321332   <<    C1111233131211111211113313331333133313232212111133132233232223213323   >>      C1111233131211111211113313331333133313232212111133132233232223213322   >>