Problem:
MathJax.Hub.Config({ tex2jax: { inlineMath: [["$","$"], ["\\(","\\)"]], processEscapes: true }});

Transformation

Write a program which performs a sequence of commands to a given string $str$. The command is one of:

print a b: print from the a-th character to the b-th character of $str$

reverse a b: reverse from the a-th character to the b-th character of $str$

replace a b p: replace from the a-th character to the b-th character of $str$ with p

Note that the indices of $str$ start with 0.

Input

In the first line, a string $str$ is given. $str$ consists of lowercase letters. In the second line, the number of commands q is given. In the next q lines, each command is given in the above mentioned format.

Output

For each print command, print a string in a line.

Constraints

$1 \leq $ length of $str \leq 1000$

$1 \leq q \leq 100$

$0 \leq a \leq b < $ length of $str$

for replace command, $b - a + 1 = $ length of $p$

Sample Input 1

abcde
3
replace 1 3 xyz
reverse 0 2
print 1 4

Sample Output 1

xaze

Sample Input 2

xyz
3
print 0 2
replace 0 2 abc
print 0 2

Sample Output 2

xyz
abc

Solution in Scala (judge verdict: Accepted)

import scala.io.StdIn._

object Main {
  def transformation(s: String, n: Int, l: List[String] = Nil): List[String] = {
    if (n > 0) {
      val transformType = readLine().split(" ")
      val start = transformType(1).toInt
      val end = transformType(2).toInt + 1
      val to = transformType(2).toInt - start + 1
      transformType(0) match {
        case "print"   => transformation(s, n - 1, l :+ s.slice(start, end))
        case "replace" => transformation(s.patch(start, transformType(3), to), n - 1, l)
        case "reverse" =>
          val reverseText = s.slice(start, end).reverse
          val sReverse = s.patch(start, reverseText, to)
          transformation(sReverse, n - 1, l)
      }
    } else l
  }

  def main(args: Array[String]): Unit = {
    val originText = readLine()
    val transformNum = readInt()
    transformation(originText, transformNum).foreach(println)
  }
}