Why is my code not running? What am I missing?

def countUpperandLowercase$($string$)$:

string$=$input$("$My dogs are NUTS"$)$

uppers $=0$

lowers $=0$

for i in string:

if$($i$.$isupper$())$:

uppers$+=1$

elif$($i$.$islower$())$:

lowers$+=1$

return $[$uppers$,$lowers$]$

print$("$The number of lower case letter is: $"+$ string$($lowers$))$

print$("$The number of non case letter is: $"+$ string$($uppers$))$