C1111233131211111211113313331333133313331211331333133313233222321   >>    C111123313121111121111331333133313331333121133133313331323322232   <<    C1111233131211111211113313331333133313331211331333133313233222323   >>      C1111233131211111211113313331333133313331211331333133313233222322   >>