1.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
1.2 is a bottom view thereof;
1.3 is a side view thereof;
1.4 is a side view thereof;
1.5 is a side view thereof;
1.6 is a side view thereof;
1.7 is a perspective view thereof;
2.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
2.2 is a bottom view thereof;
2.3 is a side view thereof;
2.4 is a side view thereof;
2.5 is a side view thereof;
2.6 is a side view thereof;
2.7 is a perspective view thereof;
3.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
3.2 is a bottom view thereof;
3.3 is a side view thereof;
3.4 is a side view thereof;
3.5 is a side view thereof;
3.6 is a side view thereof;
3.7 is a perspective view thereof;
4.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
4.2 is a bottom view thereof;
4.3 is a side view thereof;
4.4 is a side view thereof;
4.5 is a side view thereof;
4.6 is a side view thereof;
4.7 is a perspective view thereof;
5.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
5.2 is a bottom view thereof;
5.3 is a side view thereof;
5.4 is a side view thereof;
5.5 is a side view thereof;
5.6 is a side view thereof;
5.7 is a perspective view thereof;
6.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
6.2 is a bottom view thereof;
6.3 is a side view thereof;
6.4 is a side view thereof;
6.5 is a side view thereof;
6.6 is a side view thereof;
6.7 is a perspective view thereof;
7.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks
7.2 is a bottom view thereof;
7.3 is a side view thereof;
7.4 is a side view thereof;
7.5 is a side view thereof;
7.6 is a side view thereof;
7.7 is a perspective view thereof;
8.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
8.2 is a bottom view thereof;
8.3 is a side view thereof;
8.4 is a side view thereof;
8.5 is a side view thereof;
8.6 is a side view thereof;
8.7 is a perspective view thereof;
9.1 is a top view of an embodiment of an ornamental design for set of toilet cleaning blocks;
9.2 is a bottom view thereof;
9.3 is a side view thereof;
9.4 is a side view thereof;
9.5 is a side view thereof;
9.6 is a side view thereof; and
9.7 is a perspective view thereof.