C1111233131211111211113313331333133313231121133132313331322132313223212111   >>    C111123313121111121111331333133313331323112113313231333132213231322321211   <<    C1111233131211111211113313331333133313231121133132313331322132313223212113   >>      C1111233131211111211113313331333133313231121133132313331322132313223212112   >>