while True:
    try:
        str = input()
        str1 = list(str)
        str2 = ['a']*10005
        j = 0
        for i in range(len(str)):
            if str1[i] =='E' or str1[i] =='A' or str1[i] =='S' or str1[i]=='Y':
                str2[j] = str1[i]
                j += 1
        index = 0

        for i in range(0,j):
            if str2[i]=='E' :
                for jj in range(i+1,j):
                    if(str2[jj]=='A'):
                        for k in range(jj+1,j):
                            if(str2[k]=='S'):
                                for kk in range(k+1,j):
                                    if(str2[kk]=='Y'):
                                        index = 1
        if index == 0:
            print("difficult")
        elif index == 1:
            print("easy")



    except:
        break