#include<bits/stdc++.h>

#define N 10010

using namespace std;

int a[],dp[][];

int dfs(int x,int pre,int lim){

    if(x==-)return ;

    if(!lim&&~dp[x][pre]&&pre>=)return dp[x][pre];

    int maxv=lim?a[x]:,ret=;int st=;

    for(int i=;i<=maxv;i++){

        if(abs(i-pre)<)continue;

        st=i;if(i==&&pre==-)st=pre;

        ret+=dfs(x-,st,lim&&(i==maxv));

    }

    if(pre>=&&!lim)dp[x][pre]=ret;

    return ret;

}

inline int work(int x){

    int len=;

    while(x){a[len++]=x%;x/=;}

    memset(dp,,sizeof(dp));

    return dfs(len-,-,);

}

inline int read(){

    int f=,x=;char ch;

    do{ch=getchar();if(ch=='-')f=-;}while(ch<''||ch>'');

    do{x=x*+ch-'';ch=getchar();}while(ch>=''&&ch<='');

    return f*x;

}

int main(){

    int l=read(),r=read();

    printf("%d\n",work(r)-work(l-));

}