#include <stdio.h>
int main()
{
	char s[100001];
	int f = 1;
	scanf("%s",s);
	for (int i = 0;s[i];) {
		if (s[i] == '(')f = 0;
		if (f) printf("%c",s[i]);
		if (s[i++] == ')') {
			f = 1;
			printf("@");
		}
	}
}