f23 = {}
f23.ts = "8ABC7DLO5MN6Z9EFGdeJfghijkHIVrstuvwWSTUXYabclmnopqKPQRxyz01234"
f23.s52e = function(n) {
    var nl = n.length, t = [], a, b, c, x, m = function(y) { t[t.length] = f23.ts.charAt(y) }, N = f23.ts.length, N2 = N * N, N5 = N * 5
    for (x = 0; x < nl; x++) {
        a = n.charCodeAt(x)
        if (a < N5) m(Math.floor(a / N)), m(a % N)
        else m(Math.floor(a / N2) + 5), m(Math.floor(a / N) % N), m(a % N)
    }
    var s = t.join("")
    return String(s.length).length + String(s.length) + s
}

f23.s52d = function(n) {
    var c = n.charAt(0) * 1
    if (isNaN(c)) return ""
    c = n.substr(1, c) * 1
    if (isNaN(c)) return ""
    var nl = n.length, t = [], a, f, b, x = String(c).length + 1, m = function(y) { return f23.ts.indexOf(n.charAt(y)) }, N = f23.ts.length
    if (nl != x + c) return ""
    while (x < nl) {
        a = m(x++)
        if (a < 5) f = a * N + m(x)
        else f = (a - 5) * N * N + m(x) * N + m(x += 1)
        t[t.length] = String.fromCharCode(f)
        x++
    }
    return t.join("")
}