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

typedef struct node_ {
    char* val;
    struct node_ * next;
} node;

int main(int argc, char** argv) {

    if (argc != 2) {
        printf("ERROR: This program takes exactly one argument.\n");
        return 1;
    }

    char buffer[50] = "\0";

    int i;
    for (i = 0; i < strlen(argv[1]) - 1; i++) {
        char c = argv[1][i];
        if (isalpha(c)) {
            buffer[strlen(buffer)] = c; // Add character to buffer
        } else {
            printf("%s\n", buffer); // Print buffer
            buffer = "\0"; // Clear buffer
        }
    }

    return 0;
}