n, k = map(int, input().split())

if k == 1 or k == n - 1:
    print("No")
else:
    print("Yes")
    edges = []
    # Construct a chain with a negative edge in the middle
    # Middle edge is at position k, with value -(k+1)
    # Other edges are 1
    # This works for the sample case and similar configurations
    for i in range(1, n):
        if i == k:
            edges.append((i, i+1, -(k + 1)))
        else:
            edges.append((i, i+1, 1))
    # Check if the total sum is positive
    total = sum(w for u, v, w in edges)
    if total <= 0:
        # Adjust the first and last edges to ensure total sum is positive
        # For example, set them to 2 instead of 1
        edges = []
        for i in range(1, n):
            if i == k:
                edges.append((i, i+1, -(k + 1)))
            else:
                edges.append((i, i+1, 2))
    # Output the edges
    for u, v, w in edges:
        print(u, v, w)