#include 
     
      using namespace std;void print(char s, int size){    for (int i = 0; i < size-1; ++i) {        for (int j = 1; j <= size+i; ++j) {            if (j == size+i || j == size-i) {                printf("%c", s);            }            else {                printf(" ");            }        }        puts("");    }    for (int i = 0; i < size*2-1; ++i) {        printf("%c", s);    }    puts("");}int main(){    char s[5];    int size, frist = 1;     while (scanf("%s", s), s[0] != '@') {        if (!frist) {            puts("");        }        frist = 0;        scanf("%d", &size);        print(s[0], size);    }    return 0;}