C1111233131211111211113313231333133313331323221211113313311213233231   >>    C111123313121111121111331323133313331333132322121111331331121323323   <<    C1111233131211111211113313231333133313331323221211113313311213233233   >>      C1111233131211111211113313231333133313331323221211113313311213233232   >>