fun main(args: Array<String>) =
    (readLine() ?: "").let {
        solve(it)
    }.let {
        if (it) "Done!" else "Failed..."
    }.let {
        println(it)
    }

fun solve(str: String) =
    (str.length).let { len ->
        if (len % 3 != 2) {
            false
        }
        else {
            (0..(len - 1)).all {
                when (it % 3) {
                    0 -> str[it] == 'A'
                    1 -> str[it] == 'C'
                    2 -> str[it] == ','
                    else -> throw RuntimeException()
                }
            }
        }
    }