for (String expMarker : ImmutableList.of("p", "P")) {
              for (String exponent : ImmutableList.of("0", "-5", "+20", "52")) {
                for (String typePart : ImmutableList.of("", "D", "F", "d", "f")) {
                  checkTryParse(
                      signChar + hexPrefix + iPart + fPart + expMarker + exponent + typePart);
                }
              }
            }
          }
        }

            for (String expMarker : ImmutableList.of("p", "P")) {
              for (String exponent : ImmutableList.of("0", "-5", "+20", "52")) {
                for (String typePart : ImmutableList.of("", "D", "F", "d", "f")) {
                  checkTryParse(
                      signChar + hexPrefix + iPart + fPart + expMarker + exponent + typePart);
                }
              }
            }
          }
        }