## Ez dos (rev)
### Solution
We are given a DOS .com file, it will output the flag if the license entered is correct.Read the disassembly and you will get the constraint :
```str = "1337SHELL"input[:4] == str[:4]input[5] == "-"input[6] == 0x66 ^ str[5]input[7] == 0x79 ^ str[6]input[8] == 0x74 ^ str[7]input[9] == 0x79 ^ str[8]
=> input == "1337-5115"```
### Flag
```SECT{K3YG3N_MU51C_R0CK5}```