sandglass by llhuii(alt)

s=raw_input();d=l=len(s)-1
while~d<l:
\x09e=l;r=''
\x09for c in s:r+=[c,' '][e%(l-2)>0<e*e>d*d];e-=2
\x09print r;d-=2

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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