open System

let ri () = stdin.ReadLine() |> int
let ria () = stdin.ReadLine().Split() |> Array.map int

type Sol() =
    member this.Solve() = 
        let [|A;B|] = ria ()
        let f a b = (if a < b then "K" else "S")
        
        f A B |> printfn "%s"
        
        ()
let mySol = new Sol()
mySol.Solve()