import Foundation
        var text = readLine()!
        let indexs = readLine()!.components(separatedBy: " ")
        
        let index1 = Int(indexs[0])!
        let index2 = Int(indexs[1])!
        let idx1 = text.index(text.startIndex, offsetBy: index1)
        let idx2 = text.index(text.startIndex, offsetBy: index2)
        let w1 = text[idx1]
        let w2 = text[idx2]
        text.replaceSubrange(idx1..<text.index(idx1, offsetBy: 1), with: String(w2))
        text.replaceSubrange(idx2..<text.index(idx2, offsetBy: 1), with: String(w1))
        print(text)