#include <stdio.h>

void prints()
{
  printf("outgoing links\n");
}

int main(void) {
  char x = '1';

  int Aya= 0, Ayb = 0, Ayc = 0, Ayd = 0;
  int Bya= 0, Byb = 0, Byc = 0, Byd = 0;
  int Cya= 0, Cyb = 0, Cyc = 0, Cyd = 0;
  int Dya= 0, Dyb = 0, Dyc = 0, Dyd = 0;

  int n = 5;
  int i;
  int qa= -1, qb = -1, qc = -1, qd = -1;
  float pa= 1, pb = 1, pc = 1, pd = 1;
///  float temp_pa= 1, temp_pb = 1, temp_pc = 1, temp_pd = 1;
  float norm = 0.15;
  float damp = 0.85;

  char oa[4] = {'0', '0', '0', '0'};
  char ob[4] = {'0', '0', '0', '0'};
  char oc[4] = {'0', '0', '0', '0'};
  char od[4] = {'0', '0', '0', '0'};


prints();
  for (i = 0; x!= '0' ; i++)
  {
    scanf(" %c", &x);
    oa[i] = x;
    qa++;  
    if(x == 'a')
      Aya = 1;
    else if(x == 'b')
      Ayb = 1;
    else if(x == 'c')
      Ayc = 1;
    else if(x == 'd')
      Ayd = 1;
  }
  x = '1';

  prints();
  for (i = 0; x!= '0' ; i++)
  {
    scanf(" %c", &x);
    ob[i] = x;
    qb++;  
    if(x == 'a')
      Bya = 1;
    else if(x == 'b')
      Byb = 1;
    else if(x == 'c')
      Byc = 1;
    else if(x == 'd')
      Byd = 1;
  }
  x = '1';

  prints();
  for (i = 0; x!= '0' ; i++)
  {
    scanf(" %c", &x);
    oc[i] = x;
    qc++;
    if(x == 'a')
      Cya = 1;
    else if(x == 'b')
      Cyb = 1;
    else if(x == 'c')
      Cyc = 1;
    else if(x == 'd')
      Cyd = 1;
  }
  x = '1';

  prints();
  for (i = 0; x!= '0' ; i++)
  {
    scanf(" %c", &x);
    od[i] = x;
    qd++;  
    if(x == 'a')
      Dya = 1;
    else if(x == 'b')
      Dyb = 1;
    else if(x == 'c')
      Dyc = 1;
    else if(x == 'd')
      Dyd = 1;
  }
/*
  for(i = 0; oa[i] != '0' ; i++)
  {
    printf("%c", oa[i]);
  }
*/
for(int n = 0;n<40;n++){

/*
  temp_pa = norm + damp*(((Aya*pa)/qa)+((Bya*pb)/qb)+((Cya*pc)/qc)+((Dya*pd)/qd));
  temp_pb = norm + damp*(((Ayb*pa)/qa)+((Byb*pb)/qb)+((Cyb*pc)/qc)+((Dyb*pd)/qd));
  temp_pc = norm + damp*(((Ayc*pa)/qa)+((Byc*pb)/qb)+((Cyc*pc)/qc)+((Dyc*pd)/qd));
  temp_pd = norm + damp*(((Ayd*pa)/qa)+((Byd*pb)/qb)+((Cyd*pc)/qc)+((Dyd*pd)/qd));
  pa = temp_pa;
  pb = temp_pb;
  pc = temp_pc;
  pd = temp_pd;
*/

  pa = norm + damp*(((Aya*pa)/qa)+((Bya*pb)/qb)+((Cya*pc)/qc)+((Dya*pd)/qd));
  pb = norm + damp*(((Ayb*pa)/qa)+((Byb*pb)/qb)+((Cyb*pc)/qc)+((Dyb*pd)/qd));
  pc = norm + damp*(((Ayc*pa)/qa)+((Byc*pb)/qb)+((Cyc*pc)/qc)+((Dyc*pd)/qd));
  pd = norm + damp*(((Ayd*pa)/qa)+((Byd*pb)/qb)+((Cyd*pc)/qc)+((Dyd*pd)/qd));

  printf("A:%.5f\tB:%.5f\tC:%.5f\tD:%.5f\n",pa,pb,pc,pd);
}

printf("average PR is : %.5f", (pa+pb+pc+pd)/4);

  return 0;
}