open System
type Sol() =
    member this.Solve() = 
        let s = stdin.ReadLine()
        let mutable max = 0
        let mutable cnt = 0
        let N = Seq.length s
        for i = 0 to (N-1) do
            match i with
            | 0 -> ( if s.[0] = '…' then (cnt <- 1 ; max <- 1) else ( cnt <- 0 ) )
            | _ -> ( if s.[i] = '…' then (cnt <- (cnt+1) ; max <- if cnt > max then cnt else max ) else ( cnt <- 0 ) )
        
        printfn "%d" max
        
let mySol = new Sol()
mySol.Solve()