#include <stdio.h>

int main(void) {
	
	char str[1000] = "tempcrap";
	
	scanf( "%[^\n]", str );
	

	int num, ans = 0, n, pos = 0;
	while( sscanf( &str[pos], "%i%n", &num, &n ) == 1 )  {
		
		pos += n;
		ans += num;
		
	}
	
	printf( "%i", ans );
	
	return 0;
}