#data
<!DOCTYPE html>&NotEqualTilde;
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "≂̸"

#data
<!DOCTYPE html>&NotEqualTilde;A
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "≂̸A"

#data
<!DOCTYPE html>&ThickSpace;
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "  "

#data
<!DOCTYPE html>&ThickSpace;A
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "  A"

#data
<!DOCTYPE html>&NotSubset;
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "⊂⃒"

#data
<!DOCTYPE html>&NotSubset;A
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "⊂⃒A"

#data
<!DOCTYPE html>&Gopf;
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "𝔾"

#data
<!DOCTYPE html>&Gopf;A
#errors
#document
| <!DOCTYPE html>
| <html>
|   <head>
|   <body>
|     "𝔾A"