import java.util.Stack
import java.util.StringTokenizer
 
fun main() {
    val br = System.`in`.bufferedReader()
    val left = Stack<Char>()
    val right = Stack<Char>()
    val str = br.readLine()
    for (c in str) {
    	left.push(c)
    }
    val m = br.readLine().toInt()
 
    repeat(m) {
        val token = StringTokenizer(br.readLine())
        when (token.nextToken().first()) {
            'L' -> {
                if (left.isNotEmpty()) {
                    right.push(left.pop())
                }
            }
            'D' -> {
                if (right.isNotEmpty()) {
                    left.push(right.pop())
                }
            }
            'B' -> {
                if (left.isNotEmpty()) {
                    left.pop()
                }
            }
            'P' -> {
                left.push(token.nextToken().first()) 
            }
        }
    }
 
    val sb = StringBuilder()
    for (c in left) {
        sb.append(c)
    }
    for (c in right) {
        sb.append(c)
    }
    println(sb)
}

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YWJjCjkKTApMCkwKTApMClAgeApMCkIKUCB5

abc
9
L
L
L
L
L
P x
L
B
P y