s=raw_input().split() d=int(s[0]) t=s[1] for i in range(d): e=' '*i+t r=' '*i+t+' '*((2*(d-1-i))-1)+t*(not i==d-1)+' '*i o=r for j in range(d-2): o+=r[1:] print o+e[1:]
Note that non-ascii characters in the above source code will be escaped (such as \x9f).