gistfile1.txt

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Scanner;

import javax.swing.text.StyledEditorKit.ForegroundAction;


public class Problem1 {

	public static void main(String[] args) {
		//Scanner input=new Scanner (System.in);
		//String str[];
		//int index =str.indexOf("End");
		
		
		/*ArrayList<String> result = new ArrayList<String>();
		result.addAll(Arrays.asList(input.nextLine().split("\\s+")));
		
		
		int lenth1= result.size();
		System.out.println(lenth1);*/
		Scanner scanner = new Scanner(System.in);
        
        //System.out.println("Enter block size");
        String str1="";
        String line="";
		String end="End";
	
		//int n=input.nextInt();
		//System.out.println();
		int count=0;
		ArrayList<Object> list = new ArrayList<>();
		
		//(!hairList.equals(end))
		while(!str1.equals(end)){
			str1=scanner.nextLine();
			list.add(str1);
			count++;
		};
			//System.out.println(count);
			//String str[count];
	//	String subString=str.substring(0,count);
		//System.out.println(subString);
		String[] subString = new String[list.size()];
		//String[] arr = list.toArray(new String[list.size()]);
		subString = list.toArray(subString);
		//for(String s : subString)
		  //  System.out.println(s);
		int hours=0;
		int min=0;
		int lengthSub=subString.length;
		int durLen=lengthSub*2-1;
		String[] AllDurations=new String[durLen];
		//String[] AllDurations=list.subString("[ ,.]+");
		int p=0;
		//int q=p+2;
		
		for (int i = 0,a1=0,a2=1; i < subString.length-1; i++,a1=a2+1,a2=a2+2) {
			
			AllDurations[a1]=subString[i].substring(p,p+2);
			
			AllDurations[a2]=subString[i].substring(p+3,p+5);
		System.out.println(AllDurations[a1]);
		System.out.println(AllDurations[a2]);
		}
		//=subString.split("[ ,:]+");
		
		int length=AllDurations.length;
		System.out.println(AllDurations[3]);
		
		int[] IntDurations=new int[length];
		for (int i = 0; i < length; i++) {
			
			
			IntDurations[i]= Integer.parseInt(AllDurations[i]);
			
			//System.out.println(IntDurations[i]);
		}
		
		
		//System.out.println(duration);
for (int i = 0,j=1; i < length; i+=2,j+=2) {
			
			hours=hours+IntDurations[i];
			min+=IntDurations[j];
			
		}
int realHours=hours+min/60;
int realMin=min%60;


System.out.println(realHours+":"+realMin);


	}

}