P6353 [COCI 2007/2008 #3] OKTALNI

You are given a binary number. Please convert it to an octal number. --- You can use the following conversion method: - If the number of bits in the binary number is not divisible by $3$, pad $0$ on the left until the length becomes a multiple of $3$. - Split this binary number into groups of three bits. - The binary value of each group can be replaced by the digit shown in the table below.  Now complete this procedure and output the final octal result.

Input one line containing a binary number. It is guaranteed that the length does not exceed $100$, and the first bit is $1$.

Output one line containing an octal number.

#### Note **This problem is translated from [COCI2007-2008](https://hsin.hr/coci/archive/2007_2008/) [CONTEST #3](https://hsin.hr/coci/archive/2007_2008/contest3_tasks.pdf) *T2 OKTALNI***。 Translated by ChatGPT 5