n= int(input())
if n<0:
    print("Invalid input")
else:
    x=int(input())
    arr=list(map(int,input().split()))
    first=-1
    last=-1
    for i in range(n):
        if arr[i]==x:
            if first ==-1:
                 first=i
            last=i
    if first==-1:
         print(-1)
    else:
        print(first,last)