Target = 'kadomatsu'

S = input()

if len(S) > len(Target):
    print('No')
elif len(S) == len(Target):
    print('Yes' if S == Target else 'No')
else:
    i = -1
    for s in S:
        if s not in Target[i+1:]:
            print('No')
            break
        i = Target.index(s)
    else:
        print('Yes')