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510A.cpp
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510A.cpp
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// Rodrigo Farias de Macêdo
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define FOR(i,a,b) for(int i=(a),_b=(b); i<=_b; i++)
#define FORD(i,a,b) for(int i=(a),_b=(b); i>=_b; i--)
#define REP(i,a) for(int i=0,_a=(a); i<_a; i++)
#define EACH(it,a) for(__typeof(a.begin()) it = a.begin(); it != a.end(); ++it)
#define SZ(S) ((int) ((S).size()))
#define DEBUG(x) { cout << #x << " = " << x << endl; }
#define PR(a,n) { cout << #a << " = "; FOR(_,1,n) cout << a[_] << ' '; cout << endl; }
#define PR0(a,n) { REP(_,n) cout << a[_] << ' '; cout << endl; }
#define MAX 50
int n, m;
char tab[MAX][MAX];
int main() {
cin >> n >> m;
REP(i,n){
if(i%2 == 0){
REP(j,m) cout << '#';
}else if((i/2)%2 == 0){
REP(j, m-1) cout << '.';
cout << '#';
}else{
cout << '#';
REP(j, m-1) cout << '.';
}
cout << endl;
}
return 0;
}