#include #define rep(i,n) for(int i=0;i<(n);i++) using namespace std; class mint{ static const int MOD=1e9+7; int x; public: mint():x(0){} mint(long long y){ x=y%MOD; if(x<0) x+=MOD; } mint& operator+=(const mint& m){ x+=m.x; if(x>=MOD) x-=MOD; return *this; } mint& operator-=(const mint& m){ x-=m.x; if(x< 0) x+=MOD; return *this; } mint& operator*=(const mint& m){ x=1LL*x*m.x%MOD; return *this; } mint& operator/=(const mint& m){ return *this*=inverse(m); } mint operator+(const mint& m)const{ return mint(*this)+=m; } mint operator-(const mint& m)const{ return mint(*this)-=m; } mint operator*(const mint& m)const{ return mint(*this)*=m; } mint operator/(const mint& m)const{ return mint(*this)/=m; } mint operator-()const{ return mint(-x); } friend mint inverse(const mint& m){ int a=m.x,b=MOD,u=1,v=0; while(b>0){ int t=a/b; a-=t*b; swap(a,b); u-=t*v; swap(u,v); } return u; } friend istream& operator>>(istream& is,mint& m){ long long t; is>>t; m=mint(t); return is; } friend ostream& operator<<(ostream& os,const mint& m){ return os<>s>>d; int n=s.length(); if(d==0){ bool ok=true; rep(i,n) if(s[i]!='0' && s[i]!='?') ok=false; return puts(ok?"1":"0"),0; } int cnt=0,root=0; rep(i,n){ if(s[i]=='?') cnt++; else root=(root+s[i]-'0')%9; } mint ans=solve(cnt,(d-root+9)%9); if(d==9){ bool ok=true; rep(i,n) if(s[i]!='0' && s[i]!='?') ok=false; if(ok) ans-=1; } cout<