var names = Array[String]()
var data = Array[String]()
var max:Double = 0
var th:String = ""

def gc(st:String):Double={
    val a = (st.count(_=='C') + st.count(_=='G'))*100/st.length.toDouble
    BigDecimal(a).setScale(6, BigDecimal.RoundingMode.HALF_UP).toDouble
}

for (line <- scala.io.Source.fromFile("input").getLines()) {
  if (line(0)=='>') {
    names = names :+ line
    data = data :+ ""
  }
  else data(data.length-1) += line
}

for (i <- 0 until data.length){
    if(gc(data(i))>max){
        max = gc(data(i))
        th = names(i)
    }
}

println("%s\n%s".format(th.substring(1), max.toString))