require 'date'
input_format = "%Y%m%d"
d1 = Date.strptime(gets, input_format)
d2 = Date.strptime(gets, input_format)
puts d2 - d1
cmVxdWlyZSAnZGF0ZScKCmlucHV0X2Zvcm1hdCA9ICIlWSVtJWQiCmQxID0gRGF0ZS5zdHJwdGltZShnZXRzLCBpbnB1dF9mb3JtYXQpCmQyID0gRGF0ZS5zdHJwdGltZShnZXRzLCBpbnB1dF9mb3JtYXQpCgpwdXRzIGQyIC0gZDEK