var s: string; start,finish,i: integer; begin {read(s); } s: ='i aha, go home i'; start: =1; for i : = 2 to length(s)+1 do begin if (s[i] in [' ',',','.']) or (i=length(s)) then begin finish: =i-1; if s[start]=s[finish] then writeln(copy(s,start, finish-start+1)); start: =i+1; end; end; end.
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