import java.util.*

fun main(arr:Array<String>) {
    val gcp = readLine()!!.split(" ").map { it.toInt() }.toMutableList()
    val log = readLine()!!
    val gcp2 = listOf(log.count { it == 'G' }, log.count { it == 'C' }, log.count { it == 'P' }).toMutableList()
    var win = Math.min(gcp2[0], gcp[2])
    win += Math.min(gcp2[1], gcp[0])
    win += Math.min(gcp2[2], gcp[1])
    gcp[0] = Math.max(0, gcp[0] - gcp2[1])
    gcp[1] = Math.max(0, gcp[1] - gcp2[2])
    gcp[2] = Math.max(0, gcp[2] - gcp2[0])
    gcp2[0] = Math.max(0, gcp2[0] - gcp[2])
    gcp2[1] = Math.max(0, gcp2[1] - gcp[0])
    gcp2[2] = Math.max(0, gcp2[2] - gcp[1])
    var draw = Math.min(gcp[0], gcp2[0])
    draw += Math.min(gcp[1], gcp2[1])
    draw += Math.min(gcp[2], gcp2[2])
    val ans = win * 3 + draw
    println(ans)
}