# 2019 IUSB Programming Competition
# Round 1 Problem 6
# Can you reach a destination point from a source point
# Solution by Dana Vrajitoru
# Uses Python 3.6.2

def canReach(x1, y1, x2, y2):
    # base case: we're there already
    if x1 == x2 and y1 == y2:
        return True
    # another base case: we're past the destination
    elif x1 > x2 or y1 > y2:
        return False
    else:
        return canReach(x1, x1+y1, x2, y2) or canReach(x1+y1, y1, x2, y2)

# Testing the function
if __name__ == '__main__':
    print("Enter the coordinates")
    str = input().split(" ")
    x1 = int(str[0])
    y1 = int(str[1])
    x2 = int(str[2])
    y2 = int(str[3])
    if canReach(x1, y1, x2, y2):
        print("yes")
    else:
        print("no")