Caesar cipher suite

Encrypt example

$ echo "flag{404_security_not_found}" | python3 caesar.py encrypt --offset 3 --shift 8
cahf{404_jndnclol_sli_mnlwe}

Decrypt example

$ echo "cahf{404_jndnclol_sli_mnlwe}" | python3 caesar.py decrypt --offset 3 --shift 8
flag{404_security_not_found}

Crack example

$ echo "cahf{404_jndnclol_sli_mnlwe}" | python3 caesar.py crack
flag{404_security_not_found}