void word_tok(char *dest, char *str, char key){
    char *word;
    int len=0, i;

    while(str[len]!=key && str[len]!='' && str[len]!='n') len++;
    word = (char *) malloc( sizeof(char)*(len +1) );

    for(i=0; i<len; i++) word[i] = str[i];
    word[i] = '';

    strcpy(dest, word);
    free(word);

    while(str[len]==' ') len++;
    strcpy(str, str+len);
}