a = "hellbhh"

x=[]
for i in a:
    s=a.count(i)#hasvume te vor tarich qani hat ka
    if s==1:
            x.append(i)

f= str(''.join(map(str,x)))#darchnume mi bar
print(f)

print(x,len(x))














68eb404b6da509ab598f4a5dbd7e7776ee5c73fa
<mask token>

<mask token>
for i in a:
    s = a.count(i)
    if s == 1:
        x.append(i)
<mask token>
print(f)
print(x, len(x))

a = 'hellbhh'
x = []
for i in a:
    s = a.count(i)
    if s == 1:
        x.append(i)
f = str(''.join(map(str, x)))
print(f)
print(x, len(x))

a = "hellbhh"

x=[]
for i in a:
    s=a.count(i)#hasvume te vor tarich qani hat ka
    if s==1:
            x.append(i)

f= str(''.join(map(str,x)))#darchnume mi bar
print(f)

print(x,len(x))













