int main()
{
	int i,j;
	char zfc[1000];
	gets(zfc);
	for(i=0;zfc[i]!='\0';i++){
		if(zfc[i]!=' '){
		    printf("%c",zfc[i]);
		}else if(zfc[i]==' '){
			if(zfc[i+1]!=' '){
				printf(" ");
			}else{
				continue;
			}
		}
	}
	return 0;
}