diff --git a/s24/AmFam_Ashwin/13_Strings/lec-13-worksheet.pdf b/s24/AmFam_Ashwin/13_Strings/lec-13-worksheet.pdf
new file mode 100644
index 0000000000000000000000000000000000000000..6f5f7166e62b17384ca767eb970e224dd78b7ce0
Binary files /dev/null and b/s24/AmFam_Ashwin/13_Strings/lec-13-worksheet.pdf differ