#include #include #include #include #include #include #include #include #include #include #include #include #include #include #define syosu(x) fixed< P; typedef pair pdd; typedef pair pll; typedef vector vi; typedef vector vvi; typedef vector vd; typedef vector vvd; typedef vector vl; typedef vector vvl; typedef vector vc; typedef vector vvc; typedef vector vs; typedef vector vb; typedef vector vvb; typedef vector

vp; typedef vector vvp; typedef vector vpll; typedef pair pip; typedef vector vip; const int inf=1<<30; const ll INF=1ll<<52; const double pi=acos(-1); const double eps=1e-8; const ll mod=1e9+7; const vi emp; const int dx[4]={0,1,0,-1},dy[4]={1,0,-1,-0}; const int DX[8]={-1,-1,-1,0,0,1,1,1},DY[8]={1,0,-1,1,-1,1,0,-1}; vb a(10,0); int main(){ for(int i=0;i<9;i++){ int s; cin>>s; a[s-1]=1; } for(int i=0;i<10;i++) if(!a[i]) cout<