program exam4;
const
fin='exam4.in';
fou='exam4.out';
var
num:array[1..300]of longint;
a:array[1..300]of longint;
b:array[1..300]of longint;
f:array[0..20,1..300,1..300]of longint;
ll:array[0..20,1..300]of longint;
lll,q,long,p,l,i,j,m:longint;
st:string;
bo,boo:boolean;
f1,f2:text;

procedure init;
begin
assign(f1,fin); assign(f2,fou);
reset(f1); rewrite(f2);
readln(f1,st);
read(f1,m);
l:=length(st);
for i:=1 to l do
num[i]:=ord(st[i])-48;
for i:=1 to l do
for j:=1 to i do
begin
 f[0,i,j]:=num[j];
 ll[0,i]:=i;
end;
for i:=1 to m do
for j:=1 to l do
ll[i,j]:=300;
end;

procedure jia(i,j:longint);
var
p,k,l1,l2:longint;
c:array[1..300]of longint;
begin
fillchar(c,sizeof(c),0);
l1:=ll[i,j]; l2:=long;
for p:=l1 downto 1 do c[l1+1-p]:=f[i,j,p];
if l1<l2 then lll:=l2 else lll:=l1;
k:=0;
for i:=1 to lll do
begin
 b[i]:=c[i]+a[i]+k;
 k:=b[i] div 10;
 b[i]:=b[i] mod 10;
end;
if k>0 then begin inc(lll); b[lll]:=1; end;
end;

procedure compare(i,j:longint);
var
t1,t2,l1,l2,p:longint;
c:array[1..300]of longint;
begin
bo:=false;
l1:=ll[i,j]; l2:=lll;
for p:=l1 downto 1 do c[l1+1-p]:=f[i,j,p];
if l1>l2 then begin boo:=true;  exit; end;
if l2>l1 then begin boo:=false; exit; end;
if l1=l2 then
   begin
   t1:=l1; t2:=l2;
   while (t1>0)and(c[t1]=b[t2]) do
    begin dec(t1); dec(t2); end;
    if t1=0 then boo:=true
            else begin
             if c[t1]>b[t1] then boo:=true;
             if c[t1]<b[t1] then boo:=false;
                 end;
   end;
end;

begin
init;
for i:=1 to m do
for j:=i+1 to l do
for p:=i to j-1 do
if num[p+1]<>0 then
 begin
  long:=0;    fillchar(a,sizeof(a),0);
  for q:=j downto p+1 do
   begin
    inc(long); a[long]:=num[q];
   end;
   jia(i-1,p);
   compare(i,j);
   if (bo=false)and(boo=true) then
    begin
     ll[i,j]:=lll;
     for q:=lll downto 1 do
     f[i,j,lll+1-q]:=b[q];
    end;
 end;
if ll[m,l]=300 then write(f2,0)
               else
                     for i:=1 to ll[m,l] do
                     write(f2,f[m,l,i]);
close(f1); close(f2);
end.