def appendAndDelete(s, t, k):
    iter = 0
    s = []
    t = []
    while s:
        s.pop(0)
        iter += 1
    for i in t:
        s.append(i)
        iter += 1
    if (iter == k):
        print('Yes')
    else:
        print('No')
def appendAndDelete(s, t, k):
    iter = 0
    s = []
    t = []
    while s:
        s.pop(0)
        iter += 1
    for i in t:
        s.append(i)
        iter += 1
    if (iter == k):
        print('Yes')
    else:
        print('No')