let f (str : string) =
    let chain = 
        let detect c = c = '…'
        Array.unfold(fun (i, p) -> 
            if i < str.Length then 
                let chain = if detect <| str.[i] then p + 1 else 0
                Some(chain, (i + 1, chain))
            else 
                None
        ) (0, 0)
    chain |> Array.max

let S = stdin.ReadLine()

f S |> stdout.WriteLine