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### Keybase proof
I hereby claim:
* I am jasoncoposky on github.
* I am jasoncoposky (https://keybase.io/jasoncoposky) on keybase.
* I have a public key whose fingerprint is 0C13 A9DD 4F31 835E 5891 69F8 7484 CE44 C010 1F2B
To claim this, I am signing this object:
54.196.240.106
54.236.227.252
54.86.171.174
54.159.153.114
54.210.144.166
52.54.254.196
54.175.121.164
54.224.155.202
54.210.97.41
18.206.64.241
#include <string>
#include <queue>
#include <vector>
#include <iostream>
int main(int argc, char* argv[]) {
std::string allowed_characters{"01?"};
if(argc <=1 ) {