def group_keyvalue(l):
    
    result = {}
    for k, v in l:
         result.setdefault(k, []).append(v)
    return result
def is_not_prime(n):
    import math
    
    result = False
    for i in range(2,int(math.sqrt(n)) + 1):
        if n % i == 0:
            result = True
    return result