def solve(strings, start_base, end_bases):
r = Rational(0,1)
for s in strings:
r.from_base(s,start_base)
print(' = '.join('%s_{%d}' % (r.to_base(b),b) for b in end_bases))
def solve(strings, start_base, end_bases):
r = Rational(0,1)
for s in strings:
r.from_base(s,start_base)
print(' = '.join('%s_{%d}' % (r.to_base(b),b) for b in end_bases))