from collections import Counter

def something(s):

    con=Counter("doselect")
    c=Counter(s)
    flag=False
    for k,v in con.items():
        if k not in c:
            if v==1 and not flag and len(s)>7:
                flag=True
                continue
            else:
                return "NO"
        if c[k]-con[k]>=0:
            continue
        else:
            if flag:
                return "NO"
            if c[k]-con[k]==-1 and len(s)>7:
                flag=True
            else:
                return "NO"
    return "YES"