#include<stdio.h>
main()
{
      long long int a=1,b,c,d,e,f,g,h,i=0,min=0;
      while(a)
      {
              i++;
              scanf("%lld",&a);
              if(a==0)
              break;
              scanf("%lld %lld %lld",&b,&c,&d);
              f=c;
              scanf("%lld %lld %lld",&b,&c,&d);
              e=f+b;
              g=f+d;
              f=f+c;
              for(h=2;h<a;h++)
              {
                              scanf("%lld %lld %lld",&b,&c,&d);
                              min=(e<f)?e:f;
                              b=b+min;
                              min=(e<f && e<g)?e:((f<g)?f:g);
                              c=c+min;
                              min=(f<g)?f:g;
                              d=d+min;
                              e=b;
                              f=c;
                              g=d;
              }
              printf("%lld. %lld\n",i,f);
 
      }
      return 0;
}

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7
1 2 3
4 5 2
7 1 3
9 0 2
-1 9 3
8 6 11
17 53 28
10
1 2 3
4 5 2
7 1 3
-1 9 3
8 6 11
17 53 28
9 0 2
-13 12 -15
-14 29 13
48 -1000000000 11
0