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


int main(void){
    FILE *in;
    FILE *out;
    unsigned int BLOCK_SIZE = 3;
    char block[BLOCK_SIZE];
    
    in = fopen("input.txt", "rt");
    if(in == NULL){ fputs("File error", stderr); return 1; }
    
    out = fopen("output.txt", "wt");
    if(out == NULL){ fputs("File error", stderr); return 1; }
    
    while(!feof(in)){
                    memset(block, 0, sizeof(block));     //Îáíóëÿåì áëîê
                    fread(block, sizeof(block), BLOCK_SIZE, in);
                    fwrite(block, sizeof(block), BLOCK_SIZE, out);
                    
                    //!!!!!!!!
                    for(int i = 0; i < BLOCK_SIZE; i++){
                            printf("%c", block[i]);
                            printf(" ");
                    }
                            printf("\n");
                            
    }
    
    fclose(in);
    fclose(out);
    
    int p;
    scanf("%d", p);
}