【】（上）

8, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1);

function base64encode(str) {

var out, i, len;

var c1, c2, c3;

len = str.length;

i = 0;

out = "";

while (i > 2);

out += base64EncodeChars.charAt((c1 & 0x3) 2);

out += base64EncodeChars.charAt(((c1 & 0x3) 4));

out += base64EncodeChars.charAt((c2 & 0xF) 2);

out += base64EncodeChars.charAt(((c1 & 0x3) 4));

out += base64EncodeChars.charAt(((c2 & 0xF) 6));

out += base64EncodeChars.ch

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