This gives me that NZEC error and I don’t know what I did wrong.
`//Java program to show the use of Split method (Before Java 8)
import java.util.Scanner;
public class tictactoe {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
int stringNumber = input.nextInt();
for (int i = 0; i <= stringNumber; i++) {
String str = input.next();
String[] arr = str.split("");
for(int a=0; a<str.length(); a++){
if(arr[a].equals("a")){
arr[a] = "b";
}
else if(arr[a].equals("b")){
arr[a] = "c";
}
else if(arr[a].equals("c")){
arr[a] = "d";
}
else if(arr[a].equals("d")){
arr[a] = "e";
}
else if(arr[a].equals("e")){
arr[a] = "f";
}
else if(arr[a].equals("f")){
arr[a] = "g";
}
else if(arr[a].equals("g")){
arr[a] = "h";
}
else if(arr[a].equals("h")){
arr[a] = "i";
}
else if(arr[a].equals("i")){
arr[a] = "j";
}
else if(arr[a].equals("j")){
arr[a] = "k";
}
else if(arr[a].equals("k")){
arr[a] = "l";
}
else if(arr[a].equals("l")){
arr[a] = "m";
}
else if(arr[a].equals("m")){
arr[a] = "n";
}
else if(arr[a].equals("n")){
arr[a] = "o";
}
else if(arr[a].equals("o")){
arr[a] = "p";
}
else if(arr[a].equals("p")){
arr[a] = "q";
}
else if(arr[a].equals("q")){
arr[a] = "r";
}
else if(arr[a].equals("r")){
arr[a] = "s";
}
else if(arr[a].equals("s")){
arr[a] = "t";
}
else if(arr[a].equals("t")){
arr[a] = "u";
}
else if(arr[a].equals("u")){
arr[a] = "v";
}
else if(arr[a].equals("v")){
arr[a] = "w";
}
else if(arr[a].equals("w")){
arr[a] = "x";
}
else if(arr[a].equals("x")){
arr[a] = "y";
}
else if(arr[a].equals("y")){
arr[a] = "z";
}
}
for(int j=0; j<str.length(); j++){
System.out.print(arr[j]);
}
System.out.println();
}
}
}
`