C1111233131211111211113313331333133313232321333133313311231333112321   >>    C111123313121111121111331333133313331323232133313331331123133311232   <<    C1111233131211111211113313331333133313232321333133313311231333112323   >>      C1111233131211111211113313331333133313232321333133313311231333112322   >>