python

n,m=map(int,input().split())
s=input()
courses=[]
for i in range(m):
    a,b,c,d=map(int,input().split())
    a,b,c,d=a-1,b-1,c-1,d-1
    courses.append([s[a:b+1],s[c:d+1]])
for a,b in courses:
    if a==b:
        print("Yes")
    else:
        print("No")