C312312111111331312111133133313231333133313112331333132331133132232321   >>    C31231211111133131211113313331323133313331311233133313233113313223232   <<    C312312111111331312111133133313231333133313112331333132331133132232323   >>      C312312111111331312111133133313231333133313112331333132331133132232322   >>