L = [3,5,7,9]
A= L.pop(0)
L.insert(1,2)
L.append(1)
#print(L)



def f(L):
  L[0] = 5
L = [1,2,3]
A = f(L)
#print(L)





def fcn4(L):
  M = [2,4,6]
  M[1] = M[1] + M[2]
  L = M
L = [1,2,3]
A = fcn4(L)
print(L)


def change_second_to_1(L):
    L = [L[0],1] + L[2:]  
    return L

my_list = [100,True,0]
my_list = change_second_to_1(my_list)
print(my_list)

#[1, 2, 3]
#fcn4(L)
#[2, 10, 6]
#m = [1,2]
#p=m
#m[0] = 5
#print(m)
#[5, 2]
#print(p)
#[5, 2]
#p[1] = 27
#print(m)
#[5, 27]
#print(p)
#[5, 27]
#def change_second_to_1(L):
#    L = [L[0],1] + L[2:]  
#    return L
#my_list = [100,True,0]
#change_second_to_1(my_list)
#[100, 1, 0]
#print(my_list)
#[100, True, 0]
#my_list = change_second_to_1(my_list)
#print(my_list)
#[100, 1, 0]
#def change_first_to_1(L):
#    L[0] = 1
#my_list = ['a', 2, 'c']
#change_first_to_1(my_list)
#print(my_list)
#[1, 2, 'c']
#my_list = ['a', 2, 'c']
#my_list = change_first_to_1(my_list)
#print(my_list)
#None
#my_list = ['a', 2, 'c']
#change_first_to_1(my_list)
#print(my_list)
#[1, 2, 'c']
#my_list = ['a', 2, 'c']
#def change_first_to_1(L):
#    L[0] = 1
#    return L
#my_list = change_first_to_1(my_list)
#print(my_list)
#[1, 2, 'c']
#L = [1,2,3,4]
#L[0] = L[2]
#L = L.insert(0,9)
#print(L)
#None