score = input('Enter score: ')
try:
    s = float(score)
except:
    s = -1
if s > 0 and s < 0.6:
    print('F')
elif s >= 0.6 and s < 0.7:
    print('D')
elif s >= 0.7 and s < 0.8:
    print('C')
elif s >= 0.8 and s < 0.9:
    print('B')
elif s >= 0.9 and s < 1.0:
    print('A')
else:
    print('Bad score')

cde54473101afb081a05589e10754aafd4be65d6
<mask token>

<mask token>
try:
    s = float(score)
except:
    s = -1
if s > 0 and s < 0.6:
    print('F')
elif s >= 0.6 and s < 0.7:
    print('D')
elif s >= 0.7 and s < 0.8:
    print('C')
elif s >= 0.8 and s < 0.9:
    print('B')
elif s >= 0.9 and s < 1.0:
    print('A')
else:
    print('Bad score')

score = input('Enter score: ')
try:
    s = float(score)
except:
    s = -1
if s > 0 and s < 0.6:
    print('F')
elif s >= 0.6 and s < 0.7:
    print('D')
elif s >= 0.7 and s < 0.8:
    print('C')
elif s >= 0.8 and s < 0.9:
    print('B')
elif s >= 0.9 and s < 1.0:
    print('A')
else:
    print('Bad score')
