# cook your dish here
t=int(input())
for _ in range(t):
n=int(input())
a=input()
b=input()
a1=0
b1=0
for i in range(n):
if a[i]=='R':
if b[i]=='P':
b1=b1+1
elif b[i]=='S':
a1=a1+1
elif b[i]=='R':
pass
elif a[i]=='P':
if b[i]=='S':
b1=b1+1
elif b[i]=='R':
a1=a1+1
elif b[i]=='P':
pass
elif a[i]=='S':
if b[i]=='R':
b1=b1+1
elif b[i]=='P':
a1=a1+1
elif b[i]=='S':
pass
if a1<b1:
k=b1-a1
print(k)
elif a1>b1:
print(0)
elif a1==b1:
print(1)
This is my code can you tell me where is the problem