#include <iostream>
 
char find_rep(char*& s, int n){
	char* p, c = '\0';
 
	while(*s){
		p = s + 1;
		while(*p && (*p == *s))
			++p;
 
		if((int)(p - s) == n){
			c = *s;
			s = p;
			break;
		}
		++s;
	}
	return c;
}
 
int main(void){
	char s[64];
	std::cin.getline(s, sizeof(s));
 
	int  n = 3;
	char c;
	for(char* p = &s[0]; (c = find_rep(p, n)); ){
		std::cout.width(n);
		std::cout.fill(c);
		std::cout << c << std::endl;
	}
	return 0;
}
 

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XXX[abc-bla](ZZZ), 1234, 777 end @@@