def get$\_$season$($month$,$ day$)$:

month $=$ month.lower$()$

if month not in $[\text{'}$january$\text{'},$ 'february', 'march', 'april', 'may', 'june', 'july', 'august', 'september', 'october', 'november', 'december'$]$:

return "Invalid"

seasons $=\{$

"Spring": $[(3,20),(6,20)],$

"Summer": $[(6,21),(9,21)],$

"Autumn": $[(9,22),(12,20)],$

"Winter": $[(12,21),(12,31),(1,1),(3,19)]$

$\}$

month$\_$num $=\{$

"january": $1,$ "february": $2,$ "march": $3,$ "april": $4,$

"may": $5,$ "june": $6,$ "july": $7,$ "august": $8,$

"september": $9,$ "october": $10,$ "november": $11,$ "december": $12$

$\}$

if $($month$,$ day$)>=("$march$",20)$ or $($month$,$ day$)<=("$june$",20)$:

return "Spring"

elif $($month$,$ day$)>=("$june$",21)$ or $($month$,$ day$)<=("$september$",21)$:

return "Summer"

elif $($month$,$ day$)>=("$september$",22)$ or $($month$,$ day$)<=("$december$",20)$:

return "Autumn"

else:

return "Winter"

def main$()$:

month $=$ input$("$Enter the month: $")$

day $=$ int$($input$("$Enter the day: $"))$

season $=$ get$\_$season$($month$,$ day$)$

if season $==$ "Invalid":

print$("$Invalid month or day."$)$

else:

print$($f$"$The season for $\{$month$\}\{$day$\}$ is $\{$season$\}.")$

if $\_\_$name$\_\_=="\_\_$main$\_\_"$:

main$()$