#include using namespace std; #define ll long long #define FOR(i,n,m) for(int i=(n);i<(m);i++) #define REP(i,n) FOR(i,0,n) #define REPR(i,n) for(int i=(n);i>=0;i--) #define all(vec) vec.begin(),vec.end() using vi=vector; using vvi=vector; using vl=vector; using vvl=vector; using P=pair; using PP=pair; using Pl=pair; using PPl=pair; using vs=vector; #define fi first #define se second #define pb push_back templatebool chmax(T &a,const T &b){if(abool chmin(T &a,const T &b){if(a>b){a=b;return true;}return false;} const ll MOD=1000000007LL; const int INF=1<<30; const ll LINF=1LL<<60; P f(string st){ P res; REP(i,st.size()){ if(st[i]=='A'){ res.fi++; }else{ res.se++; } } return res; } int main(){ int n,m; cin>>n>>m; string s,t; cin>>s>>t; P x=f(s),y=f(t); cout<