C1111233131211111211113313231333133313331323221211113313311211113323321   >>    C111123313121111121111331323133313331333132322121111331331121111332332   <<    C1111233131211111211113313231333133313331323221211113313311211113323323   >>      C1111233131211111211113313231333133313331323221211113313311211113323322   >>