C1111233131211111211113313331333133313232212111133132313311212131   >>    C111123313121111121111331333133313331323221211113313231331121213   <<    C1111233131211111211113313331333133313232212111133132313311212133   >>      C1111233131211111211113313331333133313232212111133132313311212132   >>