fun main(args: Array<String>) {
    fun readLineLongArray(): List<Long> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toLong() }
        return ret
    }

    fun readLineLong(): Long {
        val str = readLine() as String
        return str.toLong()
    }

    fun readLineInt(): Int {
        val str = readLine() as String
        return str.toInt()
    }

    fun readLineIntArray() : List<Int> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toInt() }
        return ret
    }

    fun readLineDoubleArray(): List<Double> {
        val str = readLine() as String
        val arrStr = str.split(" ")
        val ret = arrStr.map { it.toDouble() }
        return ret
    }

    fun readLineDouble() : Double {
        val str = readLine() as String
        return str.toDouble()
    }

    fun readLineString() : String {
        return readLine() as String
    }

    //    fun readLineStringArray(): List<String> {
    //        val str = readLine() as String
    //        val arrStr = str.split(" ")
    //        return arrStr
    //    }
    val str = readLineString()
    val a = readLineIntArray()
    val sta = a[0]
    val end = a[1]
    for ((i,c) in str.withIndex()) {
        when (i) {
            sta -> print(str[end])
            end -> print(str[sta])
            else -> print(c)
        }
    }
    println()
}