#include<cstdio>

#include<cstring>

#include<algorithm>

using namespace std;

const int maxn=1e5+;

int len1,len2,len,Min,nex[maxn],ans;

char s1[maxn],s2[maxn];

void get_next(){

    int j;

    j=nex[]=-;

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

        while(j>-&&s1[i]!=s1[j+]) j=nex[j];

        if(s1[i]==s1[j+]) ++j;

        nex[i]=j;

    }

}

int main(){

    while(~scanf("%s%s",s1,s2)){

        len1=strlen(s1);

        len2=strlen(s2);

        Min=min(len1,len2);

        strcat(s1,s2);

        len=len1+len2;

        get_next();

        if(nex[len-]+>Min) ans=Min;

        else ans=nex[len-]+;

        if(ans){

            for(int i=;i<ans;++i)

                printf("%c",s1[i]);

            printf(" ");

        }

        printf("%d\n",ans);

    }

    return ;

}