import re

input_var = """THE SONNETS

                    1

From fairest creatures we desire increase,
That thereby beauty’s rose might never die,
But as the riper should by time decease,
His

she hies,             1189
And yokes her silver doves; by whose swift aid
Their mistress mounted through the empty skies,
In her light chariot quickly is convey’d;           1192
  Holding their course to Paphos, where their queen
  Means to immure herself and not be seen."""

pattern = {r'\s{3,}\d+\n' : '',
           r'\n' : ' '}
output_var = input_var
for reg, repl in pattern.items():
  output_var = re.sub(reg, repl, output_var)

print(output_var)