import strutils

const
  s = ["MrMax", "MaxValu", "MrMaxValu", "-1"]

let
  x = stdin.readLine.split.`[]` 0
  a, b = stdin.readLine.split
  r1 = x.in a
  r2 = x.in b

if r1 and r2:
  echo s[2]
elif r1:
  echo s[0]
elif r2:
  echo s[1]
else:
  echo s[3]