diff --git a/P4z_1_2019.pdf b/P4z_1_2020.pdf
similarity index 75%
rename from P4z_1_2019.pdf
rename to P4z_1_2020.pdf
index 7e3c9b239f0da41570c7f5e9c228f517f399910a..33c5a01b05ab5728388ac537655401dfd8715f8f 100644
Binary files a/P4z_1_2019.pdf and b/P4z_1_2020.pdf differ
diff --git a/P4z_2_2019.pdf b/P4z_2_2019.pdf
deleted file mode 100644
index 81a38474b9aaf4abf7df9579d0fccfe6d9e67977..0000000000000000000000000000000000000000
Binary files a/P4z_2_2019.pdf and /dev/null differ