var s,s1,s2,max:string; i,k,maxdl,j:integer; begin readln(s); s1:=concat(s,' '); s2:=s; maxdl:=0; while pos(' ',s1)>0 do begin max:=copy(s1,1,pos(' ',s1)-1); delete(s1,1,pos(' ',s1)); if maxdl<pos(' ',s1)-1 then maxdl:=length(max); end; if length(max)>maxdl then maxdl:=length(max); writeln(maxdl); end.