Base 64 Encoding

Time Limit: 1000 ms Memory Limit: 65536 KiB

Problem Description

The Base 64 encoding is designed to represent arbitrary sequences of octets in a form that requires case sensitivity but need not be humanly readable.

65-character subset of US-ASCII is used, enabling 6 bits to be represented per printable character. (The extra 65th character, "=", is used to signify a special processing function.).

The encoding process represents 24-bit groups of input bits as output strings of 4 encoded characters. Proceeding from left to right, a 24-bit input group is formed by concatenating 3 8-bit input groups. These 24 bits are then treated as 4 concatenated 6-bit groups, each of which is translated into a single digit in the base 64 alphabet(Table 1).

Each 6-bit group is used as an index into an array of 64 printable characters. The character referenced by the index is placed in the output string.

Table 1: The Base 64 Alphabet

Value Encoding  Value Encoding  Value Encoding  Value Encoding
0 A            17 R            34 i            51 z
1 B            18 S            35 j            52 0
2 C            19 T            36 k            53 1
3 D            20 U            37 l            54 2
4 E            21 V            38 m            55 3
5 F            22 W            39 n            56 4
6 G            23 X            40 o            57 5
7 H            24 Y            41 p            58 6
8 I            25 Z            42 q            59 7
9 J            26 a            43 r            60 8
10 K            27 b            44 s            61 9
11 L            28 c            45 t            62 +
12 M            29 d            46 u            63 /
13 N            30 e            47 v
14 O            31 f            48 w          (pad) =
15 P            32 g            49 x
16 Q            33 h            50 y

Special processing is performed if fewer than 24 bits are available at the end of the data being encoded. A full encoding quantum is always completed at the end of a quantity. When fewer than 24 input bits are available in an input group, zero bits are added (on the right) to form an integral number of 6-bit groups. Padding at the end of the data is performed using the \'=\' character. Since all base 64 input is an integral number of octets, only the following cases can arise:

1. the final quantum of encoding input is an integral multiple of 24 bits; here, the final unit of encoded output will be an integral multiple of 4 characters with no "=" padding,
2. the final quantum of encoding input is exactly 8 bits; here, the final unit of encoded output will be two characters followed by two "=" padding characters, or
3. the final quantum of encoding input is exactly 16 bits; here, the final unit of encoded output will be three characters followed by one "=" padding character.

Input

The first line of the input contains a single integer T (1 <= T <= 100), the number of test cases. Then T cases followed. Each case is a string(no empty string) in one line to be encoded.

Output

For each test case, the encoding result of the string will be output.

Sample Input

4
What is your name
i
you
yes

Sample Output

V2hhdCBpcyB5b3VyIG5hbWU=
aQ==
eW91
eWVz

2008湖南大学校赛