signature = function (r) {
var c, s, h, g, d, C, m, S, l, v = [];
for (r = f (r),
v = u (r),
C = 1732584193,
m = 4023233417,
S = 2562383102,
l = 271733878,
c = 0; c < v.length; c += 16)
s = C,
h = m,
g = S,
d = l,
C = n (C, m, S, l, v[c + 0], 7, 3614090360),
l = n (l, C, m, S, v[c + 1], 12, 3905402710),
S = n (S, l, C, m, v[c + 2], 17, 606105819),
m = n (m, S, l, C, v[c + 3], 22, 3250441966),
C = n (C, m, S, l, v[c + 4], 7, 4118548399),
l = n (l, C, m, S, v[c + 5], 12, 1200080426),
S = n (S, l, C, m, v[c + 6], 17, 2821735955),
m = n (m, S, l, C, v[c + 7], 22, 4249261313),
C = n (C, m, S, l, v[c + 8], 7, 1770035416),
l = n (l, C, m, S, v[c + 9], 12, 2336552879),
S = n (S, l, C, m, v[c + 10], 17, 4294925233),
m = n (m, S, l, C, v[c + 11], 22, 2304563134),
C = n (C, m, S, l, v[c + 12], 7, 1804603682),
l = n (l, C, m, S, v[c + 13], 12, 4254626195),
S = n (S, l, C, m, v[c + 14], 17, 2792965006),
m = n (m, S, l, C, v[c + 15], 22, 1236535329),
C = e (C, m, S, l, v[c + 1], 5, 4129170786),
l = e (l, C, m, S, v[c + 6], 9, 3225465664),
S = e (S, l, C, m, v[c + 11], 14, 643717713),
m = e (m, S, l, C, v[c + 0], 20, 3921069994),
C = e (C, m, S, l, v[c + 5], 5, 3593408605),
l = e (l, C, m, S, v[c + 10], 9, 38016083),
S = e (S, l, C, m, v[c + 15], 14, 3634488961),
m = e (m, S, l, C, v[c + 4], 20, 3889429448),
C = e (C, m, S, l, v[c + 9], 5, 568446438),
l = e (l, C, m, S, v[c + 14], 9, 3275163606),
S = e (S, l, C, m, v[c + 3], 14, 4107603335),
m = e (m, S, l, C, v[c + 8], 20, 1163531501),
C = e (C, m, S, l, v[c + 13], 5, 2850285829),
l = e (l, C, m, S, v[c + 2], 9, 4243563512),
S = e (S, l, C, m, v[c + 7], 14, 1735328473),
m = e (m, S, l, C, v[c + 12], 20, 2368359562),
C = o (C, m, S, l, v[c + 5], 4, 4294588738),
l = o (l, C, m, S, v[c + 8], 11, 2272392833),
S = o (S, l, C, m, v[c + 11], 16, 1839030562),
m = o (m, S, l, C, v[c + 14], 23, 4259657740),
C = o (C, m, S, l, v[c + 1], 4, 2763975236),
l = o (l, C, m, S, v[c + 4], 11, 1272893353),
S = o (S, l, C, m, v[c + 7], 16, 4139469664),
m = o (m, S, l, C, v[c + 10], 23, 3200236656),
C = o (C, m, S, l, v[c + 13], 4, 681279174),
l = o (l, C, m, S, v[c + 0], 11, 3936430074),
S = o (S, l, C, m, v[c + 3], 16, 3572445317),
m = o (m, S, l, C, v[c + 6], 23, 76029189),
C = o (C, m, S, l, v[c + 9], 4, 3654602809),
l = o (l, C, m, S, v[c + 12], 11, 3873151461),
S = o (S, l, C, m, v[c + 15], 16, 530742520),
m = o (m, S, l, C, v[c + 2], 23, 3299628645),
C = i (C, m, S, l, v[c + 0], 6, 4096336452),
l = i (l, C, m, S, v[c + 7], 10, 1126891415),
S = i (S, l, C, m, v[c + 14], 15, 2878612391),
m = i (m, S, l, C, v[c + 5], 21, 4237533241),
C = i (C, m, S, l, v[c + 12], 6, 1700485571),
l = i (l, C, m, S, v[c + 3], 10, 2399980690),
S = i (S, l, C, m, v[c + 10], 15, 4293915773),
m = i (m, S, l, C, v[c + 1], 21, 2240044497),
C = i (C, m, S, l, v[c + 8], 6, 1873313359),
l = i (l, C, m, S, v[c + 15], 10, 4264355552),
S = i (S, l, C, m, v[c + 6], 15, 2734768916),
m = i (m, S, l, C, v[c + 13], 21, 1309151649),
C = i (C, m, S, l, v[c + 4], 6, 4149444226),
l = i (l, C, m, S, v[c + 11], 10, 3174756917),
S = i (S, l, C, m, v[c + 2], 15, 718787259),
m = i (m, S, l, C, v[c + 9], 21, 3951481745),
C = t (C, s),
m = t (m, h),
S = t (S, g),
l = t (l, d);
return (a (C) + a (m) + a (S) + a (l)).toLowerCase ()
}