Write a program that takes a date as input and outputs the date's season. The input is a string to represent the month and an int to represent the day.

Ex: If the input is:

April

$11$

the output is:

Spring

In addition, check if the string and int are valid $($an actual month and day$).$

Ex: If the input is:

Blue

$65$

the output is:

Invalid

The dates for each season are:

Spring: March $20-$ June $20$

Summer: June $21-$ September $21$

Autumn: September $22-$ December $20$

Winter: December $21-$ March $19$