The following data is some of the output produced by a program. Which program produced this output?

strftime (" Thu", 1024, "%a", 0xb7f64380) =4
fwrite ("Thu", 3, 1, 0xb7f614e0) =1
fputc (‘ ‘, 0xb7f614e0) =32
strftime (" Feb", 1024, " %b", 0xb7f64380) =4
fwrite ("Feb", 3, 1, 0xb7f614e0) =1
fputc (‘ ‘, 0xb7f614e0) =32
fwrite ("19", 2, 1, 0xb7f614e0) =1