#include<bits/stdc++.h> using namespace std; const int h[9][7]= {{}, {0,0,0,0,0,0}, //1 {0,0,0,1,1,1}, //34 {1,0,1,0,1,0}, //2 {1,0,1,1,0,1}, //4 {0,1,0,0,1,0}, //14 {0,1,0,1,0,1}, //3 {1,1,1,0,0,0}, //24 {1,1,1,1,1,1} //0 }; int n,c,on[101],off[101]; inline void work(int w[9]) { int flag=1; for(int k=1; k<=w[0]; k++){ int tag=0; for(int i=1; i<=on[0]; i++) if(!h[w[k]][on[i]%6]){ tag=1; break; } if(tag) continue; for(int i=1; i<=off[0]; i++) if(h[w[k]][off[i]%6]){ tag=1; break; } if(tag) continue; flag=0; for(int i=1; i<=n; i++)printf("%d",h[w[k]][i%6]); printf("\n"); } if(flag) printf("IMPOSSIBLE"); exit(0); } int main() { int tmp; scanf("%d%d",&n,&c); while(1){ scanf("%d",&tmp); if(tmp==-1) break; on[++on[0]]=tmp; } while(1){ scanf("%d",&tmp); if(tmp==-1) break; off[++off[0]]=tmp; } if(c==0){ int w[9]={1,8}; work(w); } if(c==1){ int w[9]= {4,1,3,4,6}; work(w); } if(c==2){ int w[9]= {7,1,2,3,5,6,7,8}; work(w); } if(c>2){ int w[9]= {8,1,2,3,4,5,6,7,8}; work(w); } return 0; }