这个挑战是要唤起我们通常是错误的 mod A. Alex A.的精神。
假设您有一个名为Alex的朋友，他需要有关基本逻辑和数学（特别是数学等效性）的帮助。
他为您提供了以下形式的方程式列表，[variable] = [variable]其中a [variable]始终是单个大写字母A到Z（不是小写字母，数字，也没有其他内容）。列表中每行只有一个方程，只说了一行therefore。
上面的所有方程式therefore都是前提，假设事实成立。下面的所有等式therefore都是未经验证的命题，这是Alex试图从前提推论得出的事实，它们可能是正确的也可能不是正确的。
例如，在此等式列表中，单个结论命题A = C恰好是正确的：
A = B
B = C
therefore
A = C
告诉亚历克斯，如果他的所有命题在逻辑上都遵循给定前提，这是您的工作。也就是说，您需要在结论中告诉Alex他是对还是错。
编写一个程序/函数，该程序/函数接受所描述的一系列方程式的字符串并打印/返回
Alex is right
如果所有结论都从前提逻辑上得出，否则输出
Alex is wrong
如果在逻辑上没有从前提得出任何结论。
以字节为单位的最短代码获胜。
确保注意以下情况：
变量始终等于自己。例如
B = A therefore A = A X = X结果
Alex is right。关系未知的变量不能假定相等。例如
P = Q therefore E = R结果
Alex is wrong。如果之后没有方程式，
therefore则结论是虚空的。例如D = C therefore和
therefore都导致
Alex is right。如果之前没有方程式，
therefore则只能推断出自等式。例如therefore R = R结果
Alex is right，但therefore R = W结果
Alex is wrong。
更多例子
亚历克斯是错误的情况：（用空行分隔）
A = B
C = D
therefore
A = C
A = L
E = X
A = I
S = W
R = O
N = G
therefore
G = N
L = I
R = O
S = A
X = X
X = E
D = K
D = Q
L = P
O = L
M = O
therefore
K = L
A = B
therefore
B = C
Z = A
S = S
therefore
A = Z
A = A
S = A
A = S
Z = A
Z = A
K = L
K = X
therefore
X = P
L = X
L = P
therefore
A = B
B = C
A = C
therefore
A = A
B = B
C = C
D = D
E = E
F = F
G = G
H = H
I = I
J = J
K = K
T = I
L = L
M = M
N = N
O = O
P = P
Q = Q
R = R
S = S
T = T
U = U
V = V
W = W
X = X
Y = Y
Z = Z
A = B
B = C
C = D
D = E
E = F
F = G
G = H
H = I
I = J
J = K
K = L
L = M
M = N
N = O
O = P
P = O
Q = R
R = S
S = T
T = U
U = V
V = W
W = X
X = Y
Y = Z
therefore
A = Z
therefore
C = D
T = Y
A = Z
P = Q
therefore
E = R
therefore
R = W亚历克斯是正确的情况：
H = J
therefore
J = H
K = L
K = X
therefore
L = X
C = B
B = A
therefore
A = B
K = L
K = X
K = P
therefore
L = X
L = P
X = P
A = Y
Y = Q
Q = O
therefore
O = Y
O = A
C = C
therefore
C = C
A = B
B = A
therefore
A = B
B = A
A = B
B = C
C = D
therefore
A = A
A = B
A = C
A = D
B = A
B = B
B = C
B = D
C = A
C = B
C = C
C = D
D = A
D = B
D = C
D = D
therefore
A = A
B = B
C = C
D = D
E = E
F = F
G = G
H = H
I = I
J = J
K = K
L = L
M = M
N = N
O = O
P = P
Q = Q
R = R
S = S
T = T
U = U
V = V
W = W
X = X
Y = Y
Z = Z
D = I
F = H
J = M
therefore
M = J
D = I
H = F
A = B
B = C
C = D
D = E
E = F
F = G
G = H
H = I
I = J
J = K
K = L
L = M
M = N
N = O
O = P
P = Q
Q = R
R = S
S = T
T = U
U = V
V = W
W = X
X = Y
Y = Z
therefore
Z = A
F = R
G = I
W = L
A = B
B = C
therefore
A = C
B = A
therefore
A = A
X = X
P = P
C = G
M = C
therefore
D = C
therefore
therefore
therefore
R = R
嘿，有时候总比没有好。¯\ _（ツ）_ /¯
—
亚历A.
therefore\nTABS < SPACES->Alex is right
喜欢在序言中看到解决方案。
—
azz
Alex is wrong验证所有测试用例。