ChoHan

# initial (109 bytes)
from random import randrange as r
def choHan(g):print("You",g==("even","odd")[(r(6)+r(6))%2]and"win"or"lose")
# OR
def choHan(g):print("You",("lose","win")[("even","odd")[(r(6)+r(6))%2]==g])

# edit (105 bytes)
def choHan(g):print("You","lwoisne"["eovdedn"[(r(6)+r(6))%2::2]==g::2])

# final version (99 bytes)
r=__import__('random').randrange
def choHan(g):print("You","lwoisne"["eo"[(r(6)+r(6))%2]==g[0]::2])