#include <stdio.h>
#include <stdlib.h>
#include <string.h>

int main(void){
  char rida0[40];
  char rida1[40];
  char sona[20]; //kasutaja sisestatud sona
  int i; //kontrollib sona pikkust
  int j; //kaib massiivi-t labi
  FILE *sisse;
  int v; //kasutaja valik
  int k;
  int l;

  printf("palun sona voi lause, max 20 tahte: ");
  fgets(sona, 20, stdin);

  printf("sisestasid: %s \n", sona);
  printf("sisestuses on tahti %d \n", strlen(sona));

  sisse=fopen("tahestik.txt", "r");
   fgets(rida0, 40, sisse);
   fgets(rida1, 40, sisse);

  printf("tagasiteisenduse kontroll: \n");
  printf("teine rida \n %s", rida1);
     for(k=0; k<strlen(rida1); k++){
      for(l=0; l<strlen(rida1); l++){
       if((rida1[k]==rida1[l]) && (k!=l)){
       printf("reas on viga, paranda! \n");
       return 0;
       }
      }
     }

  printf("kuidas teisendada? \n");
  printf("1 - kui esimesest reast teise \n");
  printf("2 - kui teisest reast esimeseks \n");
  scanf("%d", &v);

 if(v==1){
  i=0;
  while(i<strlen(sona)){
   for(j=0; j<33; j++){
    if(sona[i]==rida0[j]){
      printf("%c", rida1[j]);
      j++;
    }
   }
   i++;
  }
 } else {
  i=0;
  while(i<strlen(sona)){
   for(j=0; j<33; j++){
    if(sona[i]==rida1[j]){
      printf("%c", rida0[j]);
      j++;
    }
   }
   i++;
  }
 }

  fclose(sisse);
  printf("\n");
  return 0;
}