cypher = "EOBD.7igq4;1ikb51ibOO0;:41R"
answer = ""
pos = 0;
subs = [1,-3,-1,3,-1]
for c in cypher:
answer += ( chr(ord(c) + subs[pos]) )
pos = (pos + 1) % len(subs)
print(ord('E') ^ ord('F'))
Y3lwaGVyID0gIkVPQkQuN2lncTQ7MWlrYjUxaWJPTzA7OjQxUiIKYW5zd2VyID0gIiIKcG9zID0gMDsKc3VicyA9IFsxLC0zLC0xLDMsLTFdCmZvciBjIGluIGN5cGhlcjoKCWFuc3dlciArPSAoIGNocihvcmQoYykgKyBzdWJzW3Bvc10pICkKCXBvcyA9IChwb3MgKyAxKSAlIGxlbihzdWJzKQpwcmludChvcmQoJ0UnKSBeIG9yZCgnRicpKQ==