sort by first occurrence by uru

var s,t:string(999);begin
repeat
readln(t);t:=t+^j;str(s:pos(t,s+t)-1,t,copy(s,pos(t,s+t)),s)until eof;write(s)end.

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

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