C1111233131211111211113313331333133313232321333133313121111331122112323321   >>    C111123313121111121111331333133313331323232133313331312111133112211232332   <<    C1111233131211111211113313331333133313232321333133313121111331122112323323   >>      C1111233131211111211113313331333133313232321333133313121111331122112323322   >>