#include <iostream>
#include<cstring>
using namespace std;
char *cauta(char s1[],char s2[])
{
    int i=0,n=0,k,j;
    while(s2[n]!='\0') n++;
    int ok=0;
    while(s1[i]!='\0' && ok==0)
    {
        while(s2[0]!=s1[i]&& i<strlen(s1)) i++;
        ok=1;
        for(j=1; j<n; j++)
            if(s1[i+j]!=s2[j])
                ok=0;
        if(ok==0) i++;
    }
    if(ok) return s1+i;
    else return NULL;
}

void inlocuieste(char s1[],char s2[],char s3[])
{
    int i=0,k=0;
    char s4[200];
    int n2=0,n3=0;
    while(s2[n2]!='\0')n2++;

    while(s3[n3]!='\0')n3++;

    for(int j=n2;s1[j]!='\0';j++)
        s4[k++]=s1[j];

    for(;i<n3;i++)
        s1[i]=s3[i];

    for(int j=0;j<k;i++,j++)
        s1[i]=s4[j];

    s1[i]='\0';
}
int main()
{
    char s1[200]="afara este soare este vara";
    char s2[20]="este";
    //strcpy(s1,"afara este soare este vara");
    //strcpy(s2,"este");
    char s3[20]; strcpy(s3,"era");
    char *p=cauta(s1,s2);
    int nr=0;
    while(p>0)
    {
        nr++;
        inlocuieste(p,s2,s3);
        p=cauta(p+1,s2);
    }
    cout<<nr<<endl<<s1;
    return 0;
}