hdu 4706

#include<iostream>
#include<cstdio>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>

using namespace std;

int main()
{
    printf("a e\nbdf\nc g\n");
    printf("h  n\ni mo\njl p\nk  q\n");
    printf("r   z\ns  ya\nt x b\nuw  c\nv   d\n");
    printf("e    o\nf   np\ng  m q\nh l  r\nik   s\nj    t\n");
    printf("u     g\nv    fh\nw   e i\nx  d  j\ny c   k\nzb    l\na     m\n");
    printf("n      b\no     ac\np    z d\nq   y  e\nr  x   f\ns w    g\ntv     h\nu      i\n");
    printf("j       z\nk      ya\nl     x b\nm    w  c\nn   v   d\no  u    e\np t     f\nqs      g\nr       h\n");
    printf("i        a\nj       zb\nk      y c\nl     x  d\nm    w   e\nn   v    f\no  u     g\np t      h\nqs       i\nr        j\n");

    return 0;
}