#include <stdio.h>

#include <string.h>

/**

NAME: Rares Smeu

SCHOOL: "GR.MOISIL" NCSC

GRADE: 10

DIVISION: INT 5

**/

using namespace std;

struct matrici{

int a;

int b;

}a[100],b[50],c[50];

int n;

void sterge()

{

memset(a,0,sizeof(a));

memset(b,0,sizeof(b));

memset(c,0,sizeof(c));

n=0;

}

void citire()

{

scanf("%d,",&n);

for(int i=0;i<n/2;i++)

{

scanf("%d,",&a[i].a);

}

for(int i=0;i<n/2;i++)

{

scanf("%d,",&a[i].b);

}

scanf("%d,",&b[0].a);

scanf("%d,",&b[1].a);

scanf("%d,",&b[0].b);

scanf("%d,",&b[1].b);

}

void decoderul()

{

int x=b[0].a*b[1].b-b[0].b*b[1].a;

c[0].a=b[1].b/x;

c[0].b=b[0].b*(-1)/x;

c[1].a=b[1].a*(-1)/x;

c[1].b=b[0].a/x;

}

void afis(int x)

{

while(x<=0)

x+=27;

while(x>27)

x-=27;

if(x==27)

printf(" ");

else

printf("%c",x+'A'-1);

}

void decodifica()

{

for(int i=0;i<n/2;i++)

{

int x=c[0].a*a[i].a + c[1].a*a[i].b;

afis(x);

x=c[0].b*a[i].a + c[1].b*a[i].b;

afis(x);

}

printf("\n");

}

int main()

{

freopen("matrix.in","r",stdin);

for(int w=0;w<5;w++)

{

sterge();

citire();

decoderul();

decodifica();

}

return 0;

}