assert_equal(3, "⿳".char.idc_argument_number)
assert_equal("⿳士冖匕", "壱".ids)
assert_equal(3, "壱".ids.to_a[0].char.idc_argument_number)
assert_equal(3, "⿳".char.idc_argument_number)
assert_equal("⿳士冖匕", "壱".ids)
assert_equal(3, "壱".ids.to_a[0].char.idc_argument_number)