Change '#### Try' to '### Alternate try'

This does not complete the alt code related headers but I noticed this
and it was easy to do quickly. Unless I run across another when I am
working on the README.md files of the entries I will probably have to do
the rest manually as I come across them as most likely the headers are
missing.

This was done as

    sgit -e 's/^#### Try/### Alternate try/g' '*README.md'

1984/mullender/README.md

@@ -58,7 +58,7 @@ overflow!
 BTW: is there such a thing as too fast a CPU ? :-) Actually yes for certain code
 which is probably not as uncommon as you think :-).
 
-#### Try:
+### Alternate try:
 
 
 ```sh
@@ -137,7 +137,7 @@ make gentab
 ./gentab file
 ```
 
-#### Try:
+### Alternate try:
 
 ```sh
 ./gentab gentab

1985/lycklama/README.md

@@ -76,7 +76,7 @@ make all
 ./lycklama < some_file
 ```
 
-#### Try:
+### Alternate try:
 
 ```sh
 ./lycklama < lycklama.c

1985/sicherman/README.md

@@ -45,7 +45,7 @@ make alt
 ./sicherman.alt < file
 ```
 
-#### Try:
+### Alternate try:
 
 
 ```sh

1988/litmaath/README.md

@@ -40,7 +40,7 @@ make alt
 
 Use `litmaath.alt` as you would `litmaath` above.
 
-#### Try:
+### Alternate try:
 
 ```sh
 ./litmaath.alt six was afraid of seven because seven eight nine

1993/plummer/README.md

@@ -52,7 +52,7 @@ make clobber CDEFINE="-DZ=50" alt
 ```
 
 
-#### Try:
+### Alternate try:
 
 ```sh
 ./plummer.alt xyzzyzzyx 5555

1995/garry/README.md

@@ -48,7 +48,7 @@ make alt
 ./garry.alt <input_file >output_file
 ```
 
-#### Try:
+### Alternate try:
 
 ```sh
 

2012/kang/README.md

@@ -57,7 +57,7 @@ echo vier | ./kang.alt
 echo uno | ./kang.alt
 ```
 
-#### Try:
+### Alternate try:
 
 
 ```sh