1.
2.
3.girls=['Alice','Bernice','Clarice']
boys=['Arnold','Chris','Bob']
letterGirls={}
for girl in girls:
letterGirls.setdefault(girl[0],[]).append(girl)
print([b+'+'+g for b in boys for g in letterGirls[b[0]]])
4.n=1
s=0
while n<=9:
m=1
while m<=n:
s=m*n
m+=1
print(s,' ',end='')
print('')
n+=1