program Project1;
var a,b,c:integer;f:text;
begin
assign(f,'input.dat');reset(f);
readln(f,a,b,c);close(f);
assign(f,'output.sol');rewrite(f);
if ((a+b)>c) and ((b+c)>a) and ((a+c)>b) then
write(f,'Trykutnyk isnue') else write(f,'Trykutnyk ne isnue');close(f);
end.