import random
def rollDice():
    return (random.randint(1,6), random.randint(1,6))
#for k in range(10):
    #print(rollDice())
tally = {}
num_trials = 10
for k in range(num_trials):
    roll = sum(rollDice())
    if roll in tally:
        tally[roll] += 1
    else:
        tally[roll] = 1

#this iterates throug the keys in order.
for k in sorted(tally.keys()):
    print(k, tally[k])