uses crt;
const razd:set of char=[' ','.',',',':',';','!'];
var st,buf,alpha:string;
i,k:integer;
m:array[1..255]of string;
begin
clrscr;
k:=0;
alpha:='abcdefghijklmnopqrstuvwxyz';
readln(st);
repeat
if (st[1] in razd) or (length(st)=0) then while st[1] in razd do delete(st,1,1)
else
begin
while (not (st[1] in razd)) and (length(st)>0) do
begin
buf:=buf+st[1];
delete(st,1,1);
end;
inc(k);
m[k]:=buf;
buf:='';
end;
until (length(st)=0) and (length(buf)=0);
for i:=1 to k-1 do if (m[i]<>m[k]) and (pos(m[i],alpha)>0) and (m[i][length(m[i])]='z') then write(m[i],' ');
end.