if (starts_with_digit) {
try_dcp2000 (urls, files, prefix, serial);
try_imb (urls, files, prefix, serial);
try_ims (urls, files, prefix, serial);
try_cat862 (urls, files, prefix, serial);
try_dsp100 (urls, files, prefix, serial);
if (starts_with_digit) {
try_dcp2000 (urls, files, prefix, serial);
try_imb (urls, files, prefix, serial);
try_ims (urls, files, prefix, serial);
try_cat862 (urls, files, prefix, serial);
try_dsp100 (urls, files, prefix, serial);