#include<bits/stdc++.h>
using namespace std;
int dx[2] = {1, 0};
int dy[2] = {0, 1};
vector<vector<int>> jl;
vector<int> t;
int n, m;
int cnt = 0;
void dfs(int x, int y, int depth) {
    t.push_back(x);
    t.push_back(y);
    jl.push_back(t);
    t.clear();
    if (x == n && y == m) {
        cnt++;
        cout << cnt << ":";
        for (unsigned int i = 0;i < jl.size() - 1;i++) {
            cout << jl[i][0] << "," << jl[i][1] << "->";
        }
        cout << n << "," << m << endl;
        return;
    }
    int nx , ny;
    for (int i = 0;i < 2;i++) {
        nx = x + dx[i];
        ny = y + dy[i];
        if (ny > 0 && ny <= m && nx > 0 && nx <= n) {
            dfs(nx, ny, depth + 1);
            jl.pop_back();
        }
    }
}
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cin >> n >> m;
    dfs(1, 1, 0);
    return 0;
}