C1111233131211111211113313331323133313231333133313221333131222121   >>    C111123313121111121111331333132313331323133313331322133313122212   <<    C1111233131211111211113313331323133313231333133313221333131222123   >>      C1111233131211111211113313331323133313231333133313221333131222122   >>