/*    一个非常显然的事实就是幸运号码不会太多。把表打出来，就会发现在10^10以内的幸运数只有2404个　　这个时候一个非常显然的想法就是对这些数进行容斥，即加上每个数的倍数个数，减去两个数的lcm的倍数个数，加上三个的lcm的倍数个数，……以此类推。　　这样的复杂度显然是不对的，理论上可达O(2^x)，其中xx为幸运数个数。但是由于多个数的倍数不能超过右边界，就可以剪枝，实际复杂度低了不知道多少。　　但是这样时间不够。我们还可以对幸运数进行处理，将其中是另外的幸运数的倍数的数给去掉。这样可以将需要考虑的数的个数减掉一半左右。　　最后还有一个小优化，那就是将最后需要处理的幸运数按从大到小排好序。这样可以让乘积尽早变得更大，可以减掉许多不必要的计算。　　加了上述优化，就差不多可以AC了。*/#include<cstdio>#include<iostream>#include<algorithm>#define set(x) freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);using namespace std;const int N=3000;typedef long long ll;ll l,r,now,ci,ans;ll num,cnt,a[N],b[N];void init(ll x){    if(x>r) return ;    a[num++]=x;    init(x*10+6);    init(x*10+8);}void dfs(ll x){    if(x>cnt){        if(!ci) return ;        if(ci&1) ans+=r/now-(l-1)/now;        else ans-=r/now-(l-1)/now;        return ;    }    dfs(x+1);    ll tx=now;    now=now/__gcd(now,b[x]);ci++;    if((double)now*b[x]<=r){        now*=b[x];        dfs(x+1);    }    ci--;now=tx;}int main(){    set(luckynumber);    cin>>l>>r;    init(0);num--;    sort(a+1,a+num+1);    for(int i=1;i<=num;i++){        b[++cnt]=a[i];        for(int j=1;j<cnt;j++){            if(!(a[i]%b[j])){                cnt--;break;            }        }    }    reverse(b+1,b+cnt+1);    now=1;    dfs(1);    cout<<ans;    return 0;}/*30分hash #include<cstdio>#include<cstring>#include<iostream>#include<algorithm>#define set(x) freopen(#x".in","r",stdin);freopen(#x".out","w",stdout);using namespace std;typedef long long ll;ll a,b,n;ll 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Thash{    static const int N=2e6+5,MOD=1733333;    ll tot,head[MOD+10],val[N],h[N],next[N];    void clear(){tot=0;memset(head,0,sizeof head);}    void insert(ll H,ll VAL){        for(ll i=head[H%MOD];i;i=next[i]) if(h[i]==H){val[i]=VAL;return ;}        h[++tot]=H;val[tot]=VAL;next[tot]=head[H%MOD];head[H%MOD]=tot;    }    ll get(ll H){        for(ll i=head[H%MOD];i;i=next[i]) if(h[i]==H) return val[i];        return 0;    }}M;ll solve(ll lim){    ll ans=0;    M.clear();    for(ll i=0;;i++){        if(list[i]>lim) break;        for(ll j=list[i];j<=lim;j+=list[i]){            if(!M.get(j)){                ans++;                M.insert(j,1);            }        }    }    return ans;}int main(){    set(luckynumber);    cin>>a>>b;    cout<<solve(b)-solve(a-1);    return 0;}*/