#include "stdio.h"
#include "conio.h"
#include "iostream"
#define max 500
using namespace std;
int sobotest;
int n,m,k,s,t,a[500][500],vitrii,vitrij,nhonhat;


int DijkTuan(int ab[500][500], int S,int F){
     int min,u,v,free[500],dt[500];
     for(u=1;u<=n;u++){
       free[u]=1;
       dt[u]=max;
     }
	 dt[S]=0;     
     do{
       u=0;min=max;
       for(v=1;v<=n;v++){
         if(dt[v]<min&&free[v]) min=dt[v],u=v;
       }
       if(u==0||u==F) break;
       free[u]=0;
       for(v=1;v<=n;v++) 
         if(ab[u][v]!=0&&free[v]&&dt[v]>dt[u]+ab[u][v]) 
           dt[v]=dt[u]+ab[u][v];
     }while(1);
     return dt[F];
}


void docfile(FILE *f)
{
     fscanf(f,"%d",&sobotest);
     printf("%d",sobotest);
     for(int i=0;i<sobotest;i++)
     {
         
         memset(a,0,sizeof(a));
         fscanf(f,"%d",&n);
         fscanf(f,"%d",&m);
         fscanf(f,"%d",&k);
         fscanf(f,"%d",&s);
         fscanf(f,"%d",&t);
         for(int i=1;i<=m;i++)
         {
                fscanf(f,"%d",&vitrii);
                fscanf(f,"%d",&vitrij);
                fscanf(f,"%d",&a[vitrii][vitrij]);
         }
         nhonhat=DijkTuan(a,s,t);
         printf("\n %3d\n",nhonhat);
         for(int i=1;i<=k;i++)
         {
                 fscanf(f,"%d",&vitrii);
                 fscanf(f,"%d",&vitrij);
                 int tam1=a[vitrii][vitrij];
                 int tam2=a[vitrij][vitrii];
                 int xuli;
                 fscanf(f,"%d",&xuli);
                 a[vitrii][vitrij]=xuli;
                 a[vitrij][vitrii]=xuli;
                 int DijTam=DijkTuan(a,s,t);
                 if(DijTam<nhonhat)
                 {
                       nhonhat=DijTam;
                 }
                 a[vitrii][vitrij]=tam1;
                 a[vitrij][vitrii]=tam2;
         }
         printf("\n %3d\n",nhonhat);
     }
}

int main()
{
    int thoa=5000;
     FILE *f;
     char *name="D:\\Sample.INP";
     f=fopen(name,"rt");
     docfile(f);
     getch();
     return 0;
}