Seasons

Description:

Input:

The input consists of a single string containing the name of one of the twelve months (January, February, March, April, May, June, July, August, September, October, November or December). The string is capitalized as given here.

Output:

Output a single string — the season of the year to which the given month belongs (winter, spring, summer or autumn). The name of the season should be in lowercase.

Sample Input:

April

Sample Output:

spring

Sample Input:

November

Sample Output:

autumn

Note:

Assume that winter is December through February, spring is March through May, summer is June through August and autumn is September through November.