program ministerstvo;
var a,n,i,b,j,k,p,l:longint;
    s,w,q,r:string;
begin
readln(s);
readln(w);
n:=length(s);
k:=length(w);
i:=1;
j:=1;
l:=1;
p:=1;
while i<n do begin
if s[i]<>w[j] then begin
while s[p]<>w[l] do begin
if s[p]=' ' then
s[p]:=' ' else
s[p]:='_';
p:=p+1;
i:=i+1;
end;
end;
if s[i]=w[j] then begin
i:=i+1;
j:=j+1;
l:=j;
p:=i;
end;
end;
k:=0;
for i:=1 to n do
if s[i]<>'_' then k:=k+1;
if k<length(w) then
writeln('I HAVE FAILED!!!')
else
begin
if w[length(w)]=s[n] then
write(s[i])
else
begin
for i:=1 to n-1 do
write(s[i]);
end;
end;
end.