#include <stdio.h>

#define MAXN 21

int ucitaj(char s[]);
int kopiraj4(char s1[], char s2[]);

int main(){
	char s[MAXN];
	char s4[(MAXN+1)*4];
	int n1, n2;
	n1 = ucitaj(s);
	if(n1==-1){
		printf("-1\n");
		return 1;
	}
	n2 = kopiraj4(s,s4);
	printf("%s\n", s4);

	return 0;
}

int ucitaj(char s[]){
	char c;
	int i=0;
	while((c=getchar())!='\n'){
		if(i>=MAXN-1)
			return -1;
		s[i++]=c;
	}
	s[i]='\0';
	return i;
}

int kopiraj4(char s1[], char s2[]){
	int i, j=0, k=0;
	for(i=0; i<4; i++){
		j=0;
		while(s1[j]!='\0'){
			s2[k]=s1[j];
			k++;
			j++;
		}
		s2[k]='-';
		k++;
	}
	s2[k-1]='\0';
	return k;
}