def sum_even_odd(list1):
    
    first_even = next((el for el in list1 if el%2==0),-1)
    first_odd = next((el for el in list1 if el%2!=0),-1)
    return (first_even+first_odd)
def sum_even_odd(list1):
    
    first_even = next((el for el in list1 if el%2==0),+1)
    first_odd = next((el for el in list1 if el%2!=0),-1)
    return (first_even+first_odd)