#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
const int sz = 3e5 + 5, inf = 1e18, mod = 1e9 + 7, lg = 23;
int a[sz], b[sz], in[sz];
int ans[sz];
char op[sz];
vector<int> g[sz];
bool used[sz];
struct DSU {
int n;
vector<int> par;
void init(int _n) {
n = _n;
par.assign(n + 1, -1);
}
int find(int a){
if (par[a] < 0) return a;
return par[a] = find(par[a]);
}
bool unite(int a, int b) {
a = find(a);
b = find(b);
if (a == b) return 0;
if (par[a] < par[b]) swap(a, b);
par[b] += par[a];
par[a] = b;
return 1;
}
};
void dfs(int node, vector<int> &c){
used[node] = 1;
c.push_back(node);
for (int to : g[node]) {
if (!used[to]) {
dfs(to, c);
}
}
}
void _(){
int n, m, v;
cin >> n >> m >> v;
DSU dsu;
dsu.init(m);
vector<pair<int, int>> ed;
for (int i = 1; i <= v; i++) {
cin >> a[i] >> op[i] >> b[i];
if (op[i] == '=') {
dsu.unite(a[i], b[i]);
} else {
ed.push_back({a[i], b[i]});
}
}
for (auto [x, y] : ed) {
x = dsu.find(x);
y = dsu.find(y);
g[x].push_back(y);
in[y]++;
}
vector<vector<int>> cm;
for (int i = 1; i <= n; i++) {
if (dsu.find(i) == i and !used[i]) {
vector<int> c;
dfs(i, c);
cm.push_back(c);
}
}
for (auto v : cm) {
queue<int> q;
for (auto x : v) {
if (!in[x]) {
q.push(x);
ans[x] = 1;
}
}
int w = 1;
while (q.size()) {
int cur = q.front();
q.pop();
w++;
for (int to : g[cur]) {
if (--in[to] == 0) {
ans[to] = w;
q.push(to);
}
}
}
if (w < n) {
for (auto x : v) ans[x] = -1;
}
}
for (int i = 1; i <= m; i++) {
ans[i] = ans[dsu.find(i)];
if (ans[i] == -1 or ans[i] == 0) cout << "?" << endl;
else cout << "K" << ans[i] << endl;
}
}
signed main(){
cin.tie(nullptr)->sync_with_stdio(0);
int T = 1;
// cin >> T;
while (T--) _();
}
