#include <string>#include <algorithm>#include <iostream>#include <sstream>using namespace std;int toInt(string s) {int i;stringstream sin(s);sin >> i;return i;}int main() {int f, r;string c;char s;while (cin >> f >> s >> r) {c="";for (int i = 1000000000; i; i /= 10) {if (f / i == r / i) {c = "";for (int k = i / 10; k; k /= 10)c += '0' + (r / k) % 10;} else if (i >= 10 && f / i + 1 == r / i && f % i >= r % i) {c = "";for (int k = i / 10; k; k /= 10)c += '0' + (r / k) % 10;}}cout << f << char(s);if (c == "")cout << r << endl;elsecout << c << endl;}}
