/*

First LAST Name: Anca-Adina BLANARU

School Name: National College "Andrei Saguna", Brasov, Romania

Intermediate 3, Contest #4

Input file: flock.in

Output file: flock.out

*/

#include<fstream.h>

ifstream fin("flock.in");

ofstream fout("flock.out");

int n,a[15],st;

void fly()

{

int poz=1;

if(a[1]==0 && a[10]==1)

{

a[1]=1;

a[10]=0;

poz=2;

}

for(int i=poz;i<=9;i++)

if(a[i]==1 && a[i+1]==0)

{

a[i]=0;

a[i+1]=1;

i++;

}

}

int consec()

{

int max=0,nr=0;

for(int i=1;i<=10;i++)

{

if(a[i]==1) nr++;

else nr=0;

if(nr>max) max=nr;

}

return max;

}

void main()

{

for(int i=1;i<=5;i++)

{

for(int i=1;i<15;i++) a[i]=0;

fin>>n;

for(int j=1;j<=n;j++)

{

int x;

fin>>x;

a[x]=1;

}

fin>>st;

for(j=1;j<st;j++)

fly();

fout<<consec()<<endl;

}

fin.close();

fout.close();

}