n = int(input())
m = int(input())
lst = [i+1 for i in range(n)]
acc = m
while n > 1 :
while acc > n:
acc -= n
n = n - 1
lst.pop(acc-1)
acc = acc + m - 1
print(lst[0])
n = int(input())
m = int(input())
lst = [i+1 for i in range(n)]
acc = m
while n > 1 :
while acc > n:
acc -= n
n = n - 1
lst.pop(acc-1)
acc = acc + m - 1
print(lst[0])
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