var
s1,s2:ansistring;
c,d,e,f,g:longint;
a,b,ans:array[0..20001]of integer;
procedure zj(w:longint);
var
i,j:longint;
begin
j:=0;
for i:=w to w+e do
begin
a[i]:=a[i]+10+j-b[i-w+1];
j:=a[i] div 10-1;
a[i]:=a[i] mod 10;
end;
end;
begin
assign(input,'spring.in');
assign(output,'spring.out');
reset(input);
rewrite(output);
readln(s1);
d:=length(s1);
for c:=1 to d do
a[c]:=ord(s1[d-c+1])-48;
readln(s2);
e:=length(s2);
for c:=1 to e do
b[c]:=ord(s2[e-c+1])-48;
for c:=d-e+1 downto 1 do
begin
g:=1;
for f:=c+e downto c do
if a[f]>b[f-c+1] then
begin
g:=0;break;
end
else
if a[f]<b[f-c+1] then break;
if a[f]=b[f-c+1] then g:=0;
while g=0 do
begin
zj(c);
inc(ans[c]);
g:=1;
for f:=c+e downto c do
if a[f]>b[f-c+1] then
begin
g:=0;break;
end
else
if a[f]<b[f-c+1] then break;
if a[f]=b[f-c+1] then g:=0;
end;
end;
g:=20001;
while (ans[g]=0)and(g<>0) do dec(g);
if g=0 then
begin
writeln('0');
exit;
end;
for c:=g downto 1 do
write(ans[c]);
writeln;
close(input);close(output);
end.