题目描述
CSS colors are defined using a hexadecimal (HEX) notation for the combination of Red, Green, and Blue color values (RGB).
Specifications of HEX Color Code
■ It must start with a '#' symbol.
■ It can have $3$ or $\boldsymbol{6}$ digits.
■ Each digit is in the range of $\mbox{o}$ to $\mbox{F}$. ($1,2,3,4,5,6,7,8,9,0,A,B,C,D,E$ and $\mbox{F}$).
■ $A-F$ letters can be lower case. ($a,b,c,d,e$ and $\mbox{f}$ are also valid digits).
Examples
Valid Hex Color Codes
FFF
025
F0A1FB
Invalid Hex Color Codes
fffabg
abcf
12365erff
You are given $N$ lines of CSS code. Your task is to print all valid Hex Color Codes, in order of their occurrence from top to bottom.
CSS Code Pattern
Selector
{
Property: Value;
}
Input Format
The first line contains $N$, the number of code lines.
The next $N$ lines contains CSS Codes.
Constraints
$0<N<50$
Output Format
Output the color codes with '#' symbols on separate lines.
Sample Input
11
BED
{
color: #FfFdF8; background-color:#aef;
font-size: 123px;
background: -webkit-linear-gradient(top, #f9f9f9, #fff);
}
Cab
{
background-color: #ABC;
border: 2px dashed #fff;
}
Sample Output
FfFdF8
aef
f9f9f9
fff
ABC
fff
Explanation
BED and #Cab satisfy the Hex Color Code criteria, but they are used as selectors and not as color codes in the given CSS.
Hence, the valid color codes are:
FfFdF8
aef
f9f9f9
fff
ABC
fff
Note: There are no comments ( // or / /) in CSS Code.
输入格式
见题面
输出格式
见题面