s = input()
l = list(s)
x = ''
num = ''
for i in range(len(s)-1):
if s[i].isnumeric():
if s[i-1].isalpha():
l[i] = ' ' + l[i]
if s[i+1].isalpha():
l[i] = l[i] + ' '
l = ''.join(l).split()
name = []
grade = []
for i in l:
if i.isalpha():
name.append(i)
else:
grade.append(eval(i))
print('{:.1f}'.format(sum(grade)/len(grade)))
for i in range(len(grade)):
if grade[i] == max(grade):
print('{} {:.1f}'.format(name[i],grade[i]))
for i in range(len(grade)):
if grade[i] == min(grade):
print('{} {:.1f}'.format(name[i],grade[i]))
