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

int main(int argc, char **argv) {
   int i = 0;
   int c = 1;
   char buffer[1024];

   while (c != EOF) {
       c = fgetc(stdin);
       if ( (c >= '0' && c <= '9') || (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ) {
           buffer[i++] = (char) c;
           continue;
       } else {
           if (i > 2 && (strncmp(buffer+i-3, "ing", 3) == 0 || strncmp(buffer+i-3, "ING", 3) == 0 ) ) {
               buffer[i] = 0;
               puts(buffer);
           }
           i = 0;
       }
   }
   return 0;
}