A friend sends you a message and you want to know how hard they laughed. Write count_ha(message) to return how many ha are in it, any case (Ha and HA count too).
count_ha("hahaha")→3count_ha("Ha ha, so funny")→2count_ha("hello")→0def count_ha(message):
# your code here: lower case, then count "ha"
return 0
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