Do you love Arithmetic?
# charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789{}"
# len(cipher) = 50
0.767613654951
0.5474434438
0.0141530116256
0.905785091354
0.984599892983
0.108635603812
0.140881010733
0.048862585782
0.0314901531258
0.234154054307