Buggy code:
import re                                                                                                        
import copy                                                                                                      

n,a,b,c,d=map(int,input().split())                                                                               
s=input()                                                                                                        
a-=1                                                                                                             
b-=1                                                                                                             
c-=1                                                                                                             
d-=1                                                                                                             
print(s)                                                                                                         
if "##" in s[a:c+1] or s[b:d+1]:                                                                                 
    print("No")                                                                                                  
else:                                                                                                            
    if c<d:                                                                                                      
        print("Yes")                                                                                             
    else:                                                                                                        
        if "..." in s[b-1:d+2]:                                                                                  
            print("Yes")                                                                                         
        else:                                                                                                    
            print("No")                                                                                         
            

Fixed code:
import re                                                                                                        
import copy                                                                                                      

n,a,b,c,d=map(int,input().split())                                                                               
s=input()                                                                                                        
a-=1                                                                                                             
b-=1                                                                                                             
c-=1                                                                                                             
d-=1                                                                                                             

if "##" in s[a:c+1] or "##" in s[b:d+1]:                                                                                 
    print("No")                                                                                                  
else:                                                                                                            
    if c<d:                                                                                                      
        print("Yes")                                                                                             
    else:                                                                                                        
        if "..." in s[b-1:d+2]:                                                                                  
            print("Yes")                                                                                         
        else:                                                                                                    
            print("No")