#include <bits/stdc++.h>
using namespace std;
using ll=long long;
#define F first
#define S second
#define sz(x) int(x.size())
const int V=1e9;
signed main() {
ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int L;
cin >> L;
int Q;
cin >> Q;
while(Q--) {
string s;
cin >> s;
if(s[0]=='a') {
int A;
cin >> A;
vector<int> a;
int x=0;
for(int i=19; i>=0; i--) {
int add=A&(1<<i);
if(add>0) {
x+=add;
a.push_back(x);
}
}
cout << sz(a) << ' ';
for(auto &i : a) {
cout << i << ' ';
}
cout << '\n';
}
else if(s[0]=='b') {
int B;
cin >> B;
vector<int> a;
int x=0;
for(int i=19; i>=0; i--) {
int add=B&(1<<i);
x+=add;
if(add==0) {
a.push_back(x+(1<<i));
}
}
cout << sz(a) << ' ';
for(auto &i : a) {
cout << i << ' ';
}
cout << '\n';
}
else {
int d;
cin >> d;
vector<int> c(d);
for(int i=0; i<d; i++) {
cin >> c[i];
}
for(int i=0; i<d; i++) {
if(c[i]==2) {
cout << "A\n";
c[0]=-1;
break;
}
}
if(c[0]==-1) {
cout << "B\n";
}
}
}
return 0;
}
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