#include using namespace std; #define rep(i,n) for(ll i=0;i<(n);++i) using ll = long long; using pll = pair; constexpr ll INF = (1LL<<60); constexpr ll MOD = (1e9+7); //constexpr ll MOD = (998244353); template bool chmax(T &a,const T &b){if(a bool chmin(T &a,const T &b){if(a>b){a=b;return 1;}return 0;} void dump(){cout< void dump(T&& h, Ts&&... t){cout<(t)...);} template istream &operator>>(istream&is,vector&v){for(auto &elemnt:v)is>>elemnt;return is;} template istream &operator>>(istream&is,pair&p){is>>p.first>>p.second;return is;} templatevector make_vector(size_t a){return vector(a);} templateauto make_vector(size_t a, Ts... ts){return vector(ts...))>(a, make_vector(ts...));} void solve1();void solve2(); int main(){ solve1(); return 0; } void solve1(){ ll n,m; string s; cin>>n>>m>>s; vector> adj(n); rep(i,m){ ll u,v; cin>>u>>v; u--;v--; adj[u].emplace_back(v); adj[v].emplace_back(u); } vector pd(n),ca(n); rep(i,n){ if(s[i]!='P')continue; for(auto v:adj[i]){ if(s[v]=='D')pd[v]++; } } rep(i,n){ if(s[i]!='A')continue; for(auto v:adj[i]){ if(s[v]=='C')ca[v]++; } } ll ans = 0; rep(i,n){ if(s[i]!='D')continue; for(auto v:adj[i]){ if(s[v]=='C'){ ans += pd[i]*ca[v]; ans %= MOD; } } } cout<<(ans)<