import java.util.ArrayList;

import java.util.List;

public class StringReverse {

public static String arrayPairSum(String str) {

List<Integer> indexs = new ArrayList<>();

List<String> strings = new ArrayList<>();

String newString = "";

char [] chars = str.toCharArray();

for (int i = 0; i < chars.length;i++)

if (chars[i] >= 65 && chars[i] <= 90) indexs.add(i);

for (int i = 0;i < indexs.size();i++)

strings.add((i != indexs.size() - 1) ?

str.substring(indexs.get(i),indexs.get(i + 1))

: str.substring(indexs.get(i)));

for (String string : strings){

char [] chars1 = string.toCharArray();

for (int low = 0,high = chars1.length - 1;low < high;low++,high--){

char tmp = chars1[low];

chars1[low] = chars1[high];

chars1[high] = tmp;

}

newString += new String(chars1);

}

return newString;

}

public static void main(String[]args){

String str = "MyNameIsTom";

System.out.println(arrayPairSum(str));

}

}