for _ in range(int(input())):
n = int(input())
s1 = input()
s2 = input()
for i in range(1, n, 2):
if (i+1<n and s1[i]==s2[i+1]=='<') or (s1[i]==s2[i - 1]=='<'):
print("NO")
break
else:
print("YES")
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