program wunderbaum;
 
var
    L, N, ans, multre, multdue, multsei : LongInt;
 
begin
{
    uncomment the two following lines if you want to read/write from files
    assign(input,  'input.txt');  reset(input);
    assign(output, 'output.txt'); rewrite(output);
}
 
    ReadLn(L, N);
 
    ans := 0;
    multre:=N div 3;
    multdue:= N div 2;
    multsei:= N div 6;
    ans:= 3*multre + (multdue-multsei)*2 + (N-multre-multdue+multsei);
    ans:=ans+L;
 
    WriteLn(ans);
 
end.
 

cHJvZ3JhbSB3dW5kZXJiYXVtOwoKdmFyCiAgICBMLCBOLCBhbnMsIG11bHRyZSwgbXVsdGR1ZSwgbXVsdHNlaSA6IExvbmdJbnQ7CgpiZWdpbgp7CiAgICB1bmNvbW1lbnQgdGhlIHR3byBmb2xsb3dpbmcgbGluZXMgaWYgeW91IHdhbnQgdG8gcmVhZC93cml0ZSBmcm9tIGZpbGVzCiAgICBhc3NpZ24oaW5wdXQsICAnaW5wdXQudHh0Jyk7ICByZXNldChpbnB1dCk7CiAgICBhc3NpZ24ob3V0cHV0LCAnb3V0cHV0LnR4dCcpOyByZXdyaXRlKG91dHB1dCk7Cn0KCiAgICBSZWFkTG4oTCwgTik7CgogICAgYW5zIDo9IDA7CiAgICBtdWx0cmU6PU4gZGl2IDM7CiAgICBtdWx0ZHVlOj0gTiBkaXYgMjsKICAgIG11bHRzZWk6PSBOIGRpdiA2OwogICAgYW5zOj0gMyptdWx0cmUgKyAobXVsdGR1ZS1tdWx0c2VpKSoyICsgKE4tbXVsdHJlLW11bHRkdWUrbXVsdHNlaSk7CiAgICBhbnM6PWFucytMOwogICAgCiAgICBXcml0ZUxuKGFucyk7CgplbmQuCg==

MTAgNiA=

10 6