def b a,x,y,k,m
k.times{|i|
k.times{|j|
a[x+j][y+i,1]=m
}
}
a
end

a=[]
32.times{a<<"i"*33}
a=b a,0,0,18,"a"
a=b a,0,18,15,"b"
a=b a,15,18,7,"c"
a=b a,15,25,8,"d"
a=b a,18,0,14,"e"
a=b a,18,14,4,"f"
a=b a,22,14,10,"g"
a[22][24,1]="h"

32.times{|i|
33.times{|j| print ' '+a[i][j,1]}
puts
}